MESON Chess Problem Database
Problem Display
PID: 2916 (1Q1B3K/3p1pRB/N3k3/1R2p1p1/2n3r1/6pN/6P1/8 w - - 0 1)
Gavrilov, Constantin Grigorievich
2nd Prize, Op de Hoogte, 1909
#2
9 + 8
| 2638 | White to Play | 1913 |
| 2681 | All Change Here! | 1919 |
| 785 | Het Belgisch Schaakbord (L'Echiquier Belge) | 1955 |
SOLUTION
- SOUND
- Sets
- 1...Rd4
- 2.Sxg5#
- 1...Re4
- 2.Sxg5#
- 1...Rf4
- 2.Sxg5#
- 1...Rh4
- 2.Sxg5#
- 1...Sb2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa3
- 2.Rxe5#
- 2.Qxe5#
- 1...Se3
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa5
- 2.Rxe5#
- 2.Qxe5#
- 1...Sb6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd6
- 2.Sc7#
- 1...e4
- 2.Bf5#
- 1...d5
- 2.Sc5#
- 1...d6
- 2.Qc8#
- 1...f5
- 2.Bg8#
- 1...f6
- 2.Re7#
- 1...Rd4
- Tries
- 1.Ra5?
- 1...d5
- 2.Sc5#
- 1...d6
- 2.Qc8#
- 1...Rd4
- 2.Sxg5#
- 1...Re4
- 2.Sxg5#
- 1...Rf4
- 2.Sxg5#
- 1...Rh4
- 2.Sxg5#
- 1...Sb2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa3
- 2.Rxe5#
- 2.Qxe5#
- 1...Se3
- 2.Rxe5#
- 2.Qxe5#
- 1...Sb6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd6
- 2.Sc7#
- 1...e4
- 2.Bf5#
- 1...f5
- 2.Bg8#
- 1...f6
- 2.Re7#
- 1...Sxa5!
- 1...d5
- 1.Rc5?
- 1...d6
- 2.Qc8#
- 1...Rd4
- 2.Sxg5#
- 1...Re4
- 2.Sxg5#
- 1...Rf4
- 2.Sxg5#
- 1...Rh4
- 2.Sxg5#
- 1...Sb2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa3
- 2.Rxe5#
- 2.Qxe5#
- 1...Se3
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa5
- 2.Rxe5#
- 2.Qxe5#
- 1...Sb6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd6
- 2.Sc7#
- 1...e4
- 2.Bf5#
- 1...f5
- 2.Bg8#
- 1...f6
- 2.Re7#
- 1...d5!
- 1...d6
- 1.Rg6+?
- 1...Kf5
- 2.Rgb6#
- 2.Rc6#
- 2.Rd6#
- 2.Rf6#
- 2.Rh6#
- 1...f6
- 2.Rxf6#
- 1...fxg6!
- 1...Kf5
- 1.Qd6+?
- 1...Sxd6
- 2.Sc7#
- 1...Kxd6!
- 1...Sxd6
- 1.Qc7?
- 1...Rd4
- 2.Sxg5#
- 1...Re4
- 2.Sxg5#
- 1...Rf4
- 2.Sxg5#
- 1...Rh4
- 2.Sxg5#
- 1...Sb2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa3
- 2.Rxe5#
- 2.Qxe5#
- 1...Se3
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa5
- 2.Rxe5#
- 2.Qxe5#
- 1...Sb6
- 2.Rxe5#
- 2.Qxe5#
- 1...e4
- 2.Bf5#
- 1...d5
- 2.Sc5#
- 2.Qe7#
- 1...d6
- 2.Qe7#
- 2.Qxf7#
- 2.Qc8#
- 1...f5
- 2.Bg8#
- 2.Qxd7#
- 1...f6
- 2.Re7#
- 2.Qxd7#
- 1...Sd6!
- 1...Rd4
- 1.Ra5?
- Keys
- 1.Kg8!
- 1...d5
- 2.Sc5#
- 1...d6
- 2.Qc8#
- 1...Rd4
- 2.Sxg5#
- 1...Re4
- 2.Sxg5#
- 1...Rf4
- 2.Sxg5#
- 1...Rh4
- 2.Sxg5#
- 1...Sb2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa3
- 2.Rxe5#
- 2.Qxe5#
- 1...Se3
- 2.Rxe5#
- 2.Qxe5#
- 1...Sa5
- 2.Rxe5#
- 2.Qxe5#
- 1...Sb6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sd6
- 2.Sc7#
- 1...e4
- 2.Bf5#
- 1...f5
- 2.Rg6#
- 1...f6
- 2.Re7#
- 1...d5
- 1.Kg8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::S(B),XP(e)
- R(c);N_GUARD,P_PINB(F)::S(B),XP(e)
- S(b);SBLOCK::S(D)
- P(d);::B(F)
- P(g);SBLOCK::S(D)
- P(g);OGATEB,SBLOCK::QAB(G)
- P(h);OGATEB,SBLOCK::B(F)
- P(h);OGATE,SBLOCK::R1(E)
- Tries
- Try
- R(C);
- Vars
- P(g);SBLOCK::S(D)
- P(g);OGATEB,SBLOCK::QAB(G)
- R(c);N_GUARD::S(B),XP(e)
- R(c);N_GUARD,P_PINB(F)::S(B),XP(e)
- S(b);SBLOCK::S(D)
- P(d);::B(F)
- P(h);OGATEB,SBLOCK::B(F)
- P(h);OGATE,SBLOCK::R1(E)
- Refutation
- S(b);XR(C)
- Try
- R(C);
- Vars
- P(g);OGATEB,SBLOCK::QAB(G)
- R(c);N_GUARD::S(B),XP(e)
- R(c);N_GUARD,P_PINB(F)::S(B),XP(e)
- S(b);SBLOCK::S(D)
- P(d);::B(F)
- P(h);OGATEB,SBLOCK::B(F)
- P(h);OGATE,SBLOCK::R1(E)
- Refutation
- P(g);
- Try
- R(E);CHECK
- Vars
- P(h);P_SPINP(h)::R1(E),XP(h)
- Refutation
- P(h);XR(E)
- Try
- Q(G);CHECK
- Vars
- S(b);SBLOCK,XQ(G)::S(D)
- Refutation
- K(f);P-FLIGHT,XQ(G)
- Try
- Q(G);
- Vars
- R(c);N_GUARD::S(B),XP(e)
- R(c);N_GUARD,P_PINB(F)::S(B),XP(e)
- P(d);::B(F)
- Refutation
- S(b);
- Try
- Actual
- K(I);P-FLIGHT
- Vars
- P(g);SBLOCK::S(D)
- P(g);OGATEB,SBLOCK::QAB(G)
- R(c);N_GUARD::S(B),XP(e)
- S(b);SBLOCK::S(D)
- P(d);::B(F)
- P(h);N_GUARD,SBLOCK::R(E)
- P(h);OGATE,SBLOCK::R1(E)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).