I've tested it in Linux and it works:
Compiling:
gcc -O3 main.c init.c bitboards.c hashkeys.c data.c board.c attack.c io.c movegen.c makemove.c perft.c search.c misc.c pvtable.c evaluate.c uci.c -o Volchitsa
To play 2 hyper-bullet games against a engine with changing colors and log it to test.pgn:
If the second engine is a winboard engine:
xboard -fUCI -fcp ./Volchitsa -scp SecondEngine -tc 1 -inc 0 -mg 2 -sgf test.pgn
If the second engine is a UCI engine:
xboard -fUCI -fcp ./Volchitsa -sUCI -scp SecondEngine -tc 1 -inc 0 -mg 2 -sgf test.pgn
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First of all I have tested it with a weak engine:
en.wikipedia.org/wiki/Microchessxboard -fUCI -fcp ./Volchitsa -scp microchess1976 -tc 1 -inc 0 -mg 2 -sgf test.pgn
Your engine has won both games:
Match Volchitsa 1.0 vs. Microchess: final score 2-0-0
Here are the two games:
[Event "Computer Chess Game"]
[Date "2016.06.03"]
[Round "1"]
[White "Volchitsa 1.0"]
[Black "Microchess"]
[Result "1-0"]
[TimeControl "60"]
1. e4 {+0,09/10} e5 2. Nf3 {+0,08/9 1,9} Qf6 3. Bc4 {+0,58/9 1,8} Bb4 4.
O-O {+0,75/9 1,8} Qf4 5. d4 {+1,89/9 1,7} Qxe4 6. Bxf7+ {+1,99/9 1,6} Kxf7
7. Ng5+ {+6,75/10 1,6} Kf6 8. Nxe4+ {+8,95/8 1,5} Kf5 9. Qh5+
{+12,42/7 1,5} Kxe4 10. Qxe5# {+299,99/7 1,4}
{Xboard adjudication: Checkmate} 1-0
[Event "Computer Chess Game"]
[Date "2016.06.03"]
[Round "2"]
[White "Microchess"]
[Black "Volchitsa 1.0"]
[Result "0-1"]
[TimeControl "60"]
1. e4 Nc6 {-0,09/9 2,0} 2. Qh5 Nf6 {+0,48/10 1,9} 3. Qc5 Nxe4
{+1,64/10 1,8} 4. Qd5 Nf6 {+1,84/10 1,8} 5. Qf3 e5 {+2,04/9 1,7} 6. Bb5 Nd4
{+2,35/10 1,6} 7. Qd3 c6 {+2,49/9 1,6} 8. Ba4 Qa5 {+2,54/9 1,5} 9. c3 Qxa4
{+3,04/9 1,5} 10. b3 Nxb3 {+8,37/10 1,4} 11. axb3 Qxa1 {+8,43/10 1,4} 12.
Bb2 Qxb2 {+13,12/11 1,3} 13. c4 e4 {+15,37/9 1,3} 14. Qe3 Qxb1+
{+15,74/9 1,3} 15. Ke2 d5 {+15,88/9 1,2} 16. cxd5 b6 {+17,50/9 1,2} 17.
dxc6 Ba6+ {+299,93/9 1,1} 18. d3 Bxd3+ {+299,95/8 1,1} 19. Kd2 Bb4#
{+299,99/8 1,1}
{Xboard adjudication: Checkmate} 0-1
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I ran a second test with Crafty, but Crafty was too strong.
Unfortunately I have no engine between 1500 and 1800 elo. Such a test would be very interesting.
All in all not bad for your first engine! :-)
Best regards
Beeco76