MESON Chess Problem Database
Problem Display
PID: 242168 (8/2B2NKB/6P1/8/4k3/6qR/3R2PQ/3N4 w - - 0 1)
Gavrilov, Constantin Grigorievich
Brisbane Courier, 1929
#2
10 + 2
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qf2
- 2.Sd6#
- 2.Qe5#
- 1...Qf4
- 2.Qxf4#
- 1...Qh4
- 2.Sd6#
- 2.Qe5#
- 1...Qe5+
- 2.Qxe5#
- 1...Qd6
- 2.Sxd6#
- 1...Qxg2
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qa3
- 2.Qf4#
- 2.Qe5#
- 1...Qb3
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qd3
- 2.Qe5#
- 1...Qe3
- 2.Sd6#
- 2.Qe5#
- 1...Qf3
- 2.Sd6#
- 2.Qe5#
- 1...Qxh3
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qg4
- 2.Sd6#
- 2.Qe5#
- 1...Qg5
- 2.Sd6#
- 1...Qxg6+
- 2.Bxg6#
- 1...Qe1
- Tries
- 1.Kg8?
- 1...Qxg6+
- 2.Bxg6#
- 1...Qxh2
- 2.g7#
- 1...Qxc7
- 2.g7#
- 1...Qxg2
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qxh3
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qd3
- 2.Qe5#
- 1...Qe1
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qf2
- 2.Sd6#
- 2.Qe5#
- 1...Qf4
- 2.Qxf4#
- 1...Qh4
- 2.Sd6#
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...Qd6
- 2.Sxd6#
- 1...Qa3
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qb3
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qc3
- 2.Sd6#
- 2.Qf4#
- 2.g7#
- 1...Qe3
- 2.Sd6#
- 2.Qe5#
- 2.g7#
- 1...Qf3
- 2.Sd6#
- 2.Qe5#
- 1...Qg4
- 2.Sd6#
- 2.Qe5#
- 1...Qg5
- 2.Sd6#
- 1...Kf5!
- 1...Qxg6+
- 1.Kh8?
- 1...Qe5+
- 2.Qxe5#
- 1...Qc3+
- 2.g7#
- 1...Qxh2
- 2.g7#
- 1...Qxc7
- 2.g7#
- 1...Qxg2
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qxh3
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qxg6
- 2.Sd6#
- 2.Bxg6#
- 2.Qf4#
- 2.Qe5#
- 1...Qd3
- 2.Qe5#
- 1...Qe1
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qf2
- 2.Sd6#
- 2.Qe5#
- 1...Qf4
- 2.Qxf4#
- 1...Qh4
- 2.Sd6#
- 2.Qe5#
- 1...Qd6
- 2.Sxd6#
- 1...Qa3
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qb3
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qe3
- 2.Sd6#
- 2.Qe5#
- 2.g7#
- 1...Qf3
- 2.Sd6#
- 2.Qe5#
- 1...Qg4
- 2.Sd6#
- 2.Qe5#
- 1...Qg5
- 2.Sd6#
- 1...Kf5!
- 1...Qe5+
- 1.Sh6?
- 1...Qe5+
- 2.Qxe5#
- 1...Qc3+
- 2.Sxc3#
- 1...Qxg6+
- 2.Bxg6#
- 1...Qxh2
- 2.Sf2#
- 2.Sc3#
- 2.Re3#
- 1...Qxg2
- 2.Sc3#
- 2.Re3#
- 2.Qf4#
- 2.Qe5#
- 2.Qxg2#
- 1...Qxh3
- 2.Qf4#
- 2.Qe5#
- 1...Qd3
- 2.Qe5#
- 1...Qe1
- 2.Sc3#
- 2.Qf4#
- 2.Qe5#
- 1...Qf2
- 2.Sxf2#
- 2.Sc3#
- 2.Qe5#
- 1...Qf4
- 2.Sc3#
- 2.Qxf4#
- 1...Qh4
- 2.Sc3#
- 2.Re3#
- 2.Rxh4#
- 2.Qe5#
- 1...Qd6
- 2.Sf2#
- 2.Sc3#
- 2.Re3#
- 1...Qa3
- 2.Sf2#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 1...Qb3
- 2.Sf2#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 1...Qe3
- 2.Rxe3#
- 2.Qe5#
- 1...Qf3
- 2.Qe5#
- 2.gxf3#
- 1...Qg4
- 2.Sf2#
- 2.Sc3#
- 2.Re3#
- 2.Qe5#
- 1...Qg5
- 2.Sf2#
- 2.Sc3#
- 1...Qxc7+!
- 1...Qe5+
- 1.Rh4+?
- 1...Qf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Qxh4
- 2.Sd6#
- 2.Qe5#
- 1...Qg4
- 2.Sd6#
- 2.Qe5#
- 1...Kf5!
- 1...Qf4
- 1.Kg8?
- Keys
- 1.Kf6!
- 1...Qf2+
- 2.Sxf2#
- 1...Qf4+
- 2.Qxf4#
- 1...Qh4+
- 2.Rxh4#
- 1...Qe5+
- 2.Qxe5#
- 1...Qd6+
- 2.Sxd6#
- 1...Qc3+
- 2.Sxc3#
- 1...Qf3+
- 2.gxf3#
- 1...Qg5+
- 2.Sxg5#
- 1...Qxg6+
- 2.Bxg6#
- 1...Qxh2
- 2.Sf2#
- 2.Sc3#
- 2.Sg5#
- 2.Re3#
- 2.g7#
- 1...Qxc7
- 2.Sf2#
- 2.Sg5#
- 2.Re3#
- 2.g7#
- 1...Qxg2
- 2.Sc3#
- 2.Sd6#
- 2.Re3#
- 2.Qf4#
- 2.Qe5#
- 2.Qxg2#
- 1...Qxh3
- 2.Sg5#
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Qd3
- 2.Qe5#
- 1...Qe1
- 2.Sc3#
- 2.Sg5#
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qa3
- 2.Sf2#
- 2.Sg5#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qb3
- 2.Sf2#
- 2.Sg5#
- 2.Sd6#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.g7#
- 1...Qe3
- 2.Sd6#
- 2.Rxe3#
- 2.Qe5#
- 2.g7#
- 1...Qg4
- 2.Sf2#
- 2.Sc3#
- 2.Sd6#
- 2.Re3#
- 2.Qe5#
- 1...Qf2+
- 1.Kf6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(a);N_PINP(F),OGATE::QAR1(D),XQ(a)
- Q(a);CHECK,N_PINP(F),OGATE::QAR1(D),XQ(a)
- Q(a);N_GUARD,N_PINP(F)::S(H),XQ(a)
- Q(a);N_PINP(F),OGATE::QAR1(D)
- Q(a);N_GUARD::S(H)
- Q(a);CHECK,OGATE,P_SPINQ(a),XP(F)::B(J),XQ(a)
- Tries
- Try
- K(I);P-FLIGHT
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XP(F)::B(J),XQ(a)
- Q(a);N_GUARD,N_PINP(F),XQ(D)::B(J)+P(F)
- Q(a);N_GUARD,N_PINP(F),XB(G)::B(J)+P(F)
- Q(a);N_PINP(F),OGATE::QAR1(D)
- Q(a);N_PINP(F),OGATE::QAR1(D),XQ(a)
- Q(a);N_GUARD,N_PINP(F)::S(H),XQ(a)
- Q(a);N_GUARD::S(H)
- Refutation
- K(b);S_FLIGHT
- Try
- K(I);N_SPINP(F),S_FLIGHT
- Vars
- Q(a);CHECK,OGATE::QAR1(D),XQ(a)
- Q(a);CHECK,N_GUARD::B(J)+P(F)
- Q(a);N_GUARD,XQ(D)::B(J)+P(F)
- Q(a);N_GUARD,XB(G)::B(J)+P(F)
- Q(a);OGATE::QAR1(D)
- Q(a);OGATE::QAR1(D),XQ(a)
- Q(a);N_GUARD::S(H),XQ(a)
- Q(a);N_GUARD::S(H)
- Refutation
- K(b);S_FLIGHT
- Try
- S(H);
- Vars
- Q(a);CHECK,N_PINP(F),OGATE::QAR1(D),XQ(a)
- Q(a);CHECK,N_GUARD,N_PINP(F)::S(A),XQ(a)
- Q(a);CHECK,OGATE,P_SPINQ(a),XP(F)::B(J),XQ(a)
- Q(a);N_PINP(F),OGATE::QAR1(D)
- Refutation
- Q(a);CHECK,N_PINP(F),XB(G)
- Try
- R(E);CHECK
- Refutation
- K(b);S_FLIGHT
- Try
- Actual
- K(I);N_SPINP(F),S_FLIGHT
- Vars
- Q(a);CHECK,N_GUARD::S(A),XQ(a)
- Q(a);CHECK,OGATE::QAR1(D),XQ(a)
- Q(a);CHECK,N_GUARD::R(E),XQ(a)
- Q(a);CHECK,N_GUARD::S(H),XQ(a)
- Q(a);CHECK,OGATE::P(C),XQ(a)
- Q(a);CHECK,OGATE,P_SPINQ(a),XP(F)::B(J),XQ(a)
- Q(a);OGATE::QAR1(D)
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).