MESON Chess Problem Database
Problem Display
PID: 87761 (8/3NN2B/K4Qr1/4p3/4k3/b1R2p2/b3rB2/3R2q1 w - - 0 1)
Rukhlis, Efim Naumovich
Problemisty, 1968
#2
8 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxf2
- 2.Bxg6#
- 1...Qh2
- 2.Bxg6#
- 1...Qxd1
- 2.Bxg6#
- 1...Qe1
- 2.Bxg6#
- 1...Qf1
- 2.Bxg6#
- 1...Qh1
- 2.Bxg6#
- 1...Rb2
- 2.Re3#
- 1...Rc2
- 2.Re3#
- 1...Re3
- 2.Rxe3#
- 1...Bb1
- 2.Rc4#
- 1...Bc4+
- 2.Rxc4#
- 1...Be6
- 2.Qxe5#
- 2.Qxf3#
- 1...Bc1
- 2.Sc5#
- 1...Bb2
- 2.Sc5#
- 1...Bc5
- 2.Sxc5#
- 1...Bd6
- 2.Qxf3#
- 2.Qf5#
- 1...Qxf2
- Tries
- 1.Ka5?
- threat
- 2.Qxe5#
- 2.Qxf3#
- 2.Qf5#
- 1...Qxf2
- 2.Bxg6#
- 2.Qxe5#
- 2.Qf5#
- 1...Rxf2
- 2.Qxe5#
- 2.Qf5#
- 1...Bxe7
- 2.Qxe5#
- 2.Qxf3#
- 1...Qh2
- 2.Bxg6#
- 2.Qxf3#
- 2.Qf5#
- 1...Qh1
- 2.Bxg6#
- 2.Qxe5#
- 2.Qf5#
- 1...Qg2
- 2.Qxe5#
- 2.Qf5#
- 1...Qg3
- 2.Qf5#
- 1...Qg4
- 2.Qxe5#
- 1...Qg5
- 2.Qxf3#
- 1...Re3
- 2.Rxe3#
- 2.Qxe5#
- 2.Qf5#
- 1...Be6
- 2.Qxe5#
- 2.Qxf3#
- 1...Bd6
- 2.Qxf3#
- 2.Qf5#
- 1...Bb4+!
- threat
- 1.Kb5?
- threat
- 2.Qxe5#
- 2.Qxf3#
- 2.Qf5#
- 1...Bc4+
- 2.Rxc4#
- 1...Qxf2
- 2.Bxg6#
- 2.Qxe5#
- 2.Qf5#
- 1...Rxf2
- 2.Qxe5#
- 2.Qf5#
- 1...Bxe7
- 2.Qxe5#
- 2.Qxf3#
- 1...Qh2
- 2.Bxg6#
- 2.Qxf3#
- 2.Qf5#
- 1...Qh1
- 2.Bxg6#
- 2.Qxe5#
- 2.Qf5#
- 1...Qg2
- 2.Qxe5#
- 2.Qf5#
- 1...Qg3
- 2.Qf5#
- 1...Qg4
- 2.Qxe5#
- 1...Qg5
- 2.Qxf3#
- 1...Re3
- 2.Rxe3#
- 2.Qxe5#
- 2.Qf5#
- 1...Be6
- 2.Qxe5#
- 2.Qxf3#
- 1...Bd6
- 2.Qxf3#
- 2.Qf5#
- 1...Rb2+!
- threat
- 1.Ka7?
- threat
- 2.Qxe5#
- 2.Qxf3#
- 2.Qf5#
- 1...Bc5+
- 2.Sxc5#
- 1...Rxf2
- 2.Qxe5#
- 2.Qf5#
- 1...Bxe7
- 2.Qxe5#
- 2.Qxf3#
- 1...Qh2
- 2.Bxg6#
- 2.Qxf3#
- 2.Qf5#
- 1...Qh1
- 2.Bxg6#
- 2.Qxe5#
- 2.Qf5#
- 1...Qg2
- 2.Qxe5#
- 2.Qf5#
- 1...Qg3
- 2.Qf5#
- 1...Qg4
- 2.Qxe5#
- 1...Qg5
- 2.Qxf3#
- 1...Re3
- 2.Rxe3#
- 2.Qxe5#
- 2.Qf5#
- 1...Be6
- 2.Qxe5#
- 2.Qxf3#
- 1...Bd6
- 2.Qxf3#
- 2.Qf5#
- 1...Qxf2+!
- threat
- 1.Sb6?
- threat
- 2.Qxf3#
- 2.Qf5#
- 1...Bc4+
- 2.Rxc4#
- 1...Qxf2
- 2.Bxg6#
- 2.Qf5#
- 1...Rxf2
- 2.Qf5#
- 1...Bxe7
- 2.Qxf3#
- 1...Qh1
- 2.Bxg6#
- 2.Qf5#
- 1...Qg2
- 2.Qf5#
- 1...Qg3
- 2.Qf5#
- 1...Qg5
- 2.Qxf3#
- 1...Re3
- 2.Rxe3#
- 2.Qf5#
- 1...Be6
- 2.Qxf3#
- 1...Qg4!
- threat
- 1.Sc6?
- threat
- 2.Qxe5#
- 2.Qxf3#
- 1...Bc4+
- 2.Rxc4#
- 1...Qxf2
- 2.Bxg6#
- 2.Qxe5#
- 1...Rxf2
- 2.Qxe5#
- 1...Qh2
- 2.Bxg6#
- 2.Qxf3#
- 1...Qh1
- 2.Bxg6#
- 2.Qxe5#
- 1...Qg2
- 2.Qxe5#
- 1...Qg4
- 2.Qxe5#
- 1...Qg5
- 2.Qxf3#
- 1...Re3
- 2.Rxe3#
- 2.Qxe5#
- 1...Bd6
- 2.Qxf3#
- 1...Qg3!
- threat
- 1.Sxg6?
- threat
- 2.Qxe5#
- 2.Qxf3#
- 1...Bc4+
- 2.Rxc4#
- 1...Qxf2
- 2.Sf4#
- 2.Sh4#
- 2.Sgxe5#
- 2.Se7#
- 2.Sgf8#
- 2.Sh8#
- 2.Qxe5#
- 1...Qxg6
- 2.Bxg6#
- 1...Rxf2
- 2.Qxe5#
- 1...Qh2
- 2.Sh4#
- 2.Qxf3#
- 1...Qh1
- 2.Sh4#
- 2.Qxe5#
- 1...Qg2
- 2.Qxe5#
- 1...Qg4
- 2.Qxe5#
- 1...Qg5
- 2.Qxf3#
- 1...Re3
- 2.Rxe3#
- 2.Qxe5#
- 1...Bd6
- 2.Qxf3#
- 1...Qg3!
- threat
- 1.Bxg1?
- threat
- 2.Bxg6#
- 1...Bc4+
- 2.Rxc4#
- 1...Rg2
- 2.Re3#
- 1...Be6
- 2.Qxe5#
- 2.Qxf3#
- 1...Bf7!
- threat
- 1.Rxa3?
- threat
- 2.Sc5#
- 1...Qxf2
- 2.Bxg6#
- 1...Rc2
- 2.Re3#
- 1...Bc4+!
- threat
- 1.Rc6?
- threat
- 2.Qxe5#
- 2.Qf5#
- 1...Bc4+
- 2.Rxc4#
- 1...Qxf2
- 2.Qxe5#
- 1...Qxd1
- 2.Bxg6#
- 2.Qf5#
- 1...Rxf2
- 2.Qxe5#
- 1...Bxe7
- 2.Qxe5#
- 1...Rd2
- 2.Qf5#
- 1...Qg3
- 2.Qf5#
- 1...Qh2
- 2.Bxg6#
- 2.Qf5#
- 1...Qg4
- 2.Qxe5#
- 1...Be6
- 2.Qxe5#
- 1...Bb2
- 2.Sc5#
- 2.Qf5#
- 1...Bd6
- 2.Qf5#
- 1...Qg5!
- threat
- 1.Qc6+?
- 1...Bd5
- 2.Rc4#
- 1...Kf4!
- 1...Bd5
- 1.Qxg6+?
- 1...Kf4
- 2.Qf5#
- 1...Qxg6+!
- 1...Kf4
- 1.Ka5?
- Keys
- 1.Rd6!
- threat
- 2.Qxe5#
- 2.Qxf3#
- 2.Qf5#
- 1...Bc4+
- 2.Rxc4#
- 1...Qxf2
- 2.Bxg6#
- 2.Qxe5#
- 2.Qf5#
- 1...Rxf2
- 2.Qxe5#
- 2.Qf5#
- 1...Bxd6
- 2.Qxf3#
- 2.Qf5#
- 1...Qg3
- 2.Qf5#
- 1...Qh2
- 2.Bxg6#
- 2.Qxf3#
- 2.Qf5#
- 1...Qh1
- 2.Bxg6#
- 2.Qxe5#
- 2.Qf5#
- 1...Qg2
- 2.Qxe5#
- 2.Qf5#
- 1...Qg4
- 2.Qxe5#
- 1...Qg5
- 2.Qxf3#
- 1...Re3
- 2.Rxe3#
- 2.Qxe5#
- 2.Qf5#
- 1...Be6
- 2.Qxe5#
- 2.Qxf3#
- threat
- 1.Rd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 13
- Sets
- Q(a);N_GUARD,XB(B)::B(H),XR(h)
- Q(a);N_GUARD::B(H),XR(h)
- Q(a);N_GUARD,XR(A)::B(H),XR(h)
- R(c);N_GUARD::R1(C)
- R(c);N_GUARD::R1(C),XR(c)
- B(b);N_GUARD::R(C)
- B(b);CHECK,N_GUARD::R(C),XB(b)
- B(d);N_GUARD::S(F)
- B(d);N_GUARD::S(F),XB(d)
- Tries
- Try
- K(D);N_SPINQ(E),P-FLIGHT
- Threat
- DUALS(3)
- Vars
- Q(a);::QAB1(E)
- Q(a);::QAR1(E),XP(g)
- Q(a);::QAB1(E),XP(e)
- Refutation
- B(d);CHECK
- Try
- K(D);N_SPINQ(E),S_FLIGHT
- Threat
- DUALS(3)
- Vars
- B(b);CHECK,N_GUARD::R(C),XB(b)
- Q(a);::QAB1(E)
- Q(a);::QAR1(E),XP(g)
- Q(a);::QAB1(E),XP(e)
- Refutation
- R(c);CHECK
- Try
- K(D);N_SPINQ(E),P-FLIGHT,P_SPINB(B)
- Threat
- DUALS(3)
- Vars
- B(d);CHECK,N_GUARD,N_PINB(B)::S(F),XB(d)
- Q(a);N_PINB(B)::QAB1(E)
- Q(a);N_PINB(B)::QAR1(E),XP(g)
- Q(a);N_PINB(B)::QAB1(E),XP(e)
- Refutation
- Q(a);CHECK,XB(B)
- Try
- S(F);N_SPINQ(E)
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,N_GUARD::R(C),XB(b)
- R(c);XB(B)::QAB1(E)
- B(d);XS(G)::QAB1(E),XP(e)
- Q(a);::QAB1(E)
- Q(a);::QAB1(E),XP(e)
- B(b);::QAB1(E),XP(e)
- Refutation
- Q(a);
- Try
- S(G);N_SPINQ(E)
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,N_GUARD::R(C),XB(b)
- R(c);XB(B)::QAR1(E),XP(g)
- Q(a);::QAR1(E),XP(g)
- Q(a);::QAB1(E),XP(e)
- B(d);::QAB1(E),XP(e)
- Refutation
- Q(a);
- Try
- S(G);N_SPINQ(E),XR(h)
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,N_GUARD::R(C),XB(b)
- Q(a);OGATE,P_PINQ(E),P_SPINQ(a),XS(G)::B(H),XQ(a)
- R(c);XB(B)::QAR1(E),XP(g)
- Q(a);::QAR1(E),XP(g)
- Q(a);::QAB1(E),XP(e)
- B(d);::QAB1(E),XP(e)
- Refutation
- Q(a);
- Try
- B(B);XQ(a)
- Threat
- B(H),XR(h)
- Vars
- B(b);CHECK,N_GUARD::R(C),XB(b)
- R(c);N_GUARD::R1(C)
- Refutation
- B(b);
- Try
- R(C);XB(d)
- Threat
- S(F)
- Vars
- Q(a);N_GUARD,XB(B)::B(H),XR(h)
- R(c);N_GUARD::R1(C)
- Refutation
- B(b);CHECK
- Try
- R(C);N_SPINQ(E)
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,N_GUARD::R(C),XB(b)
- Q(a);XB(B)::QAR1(E),XP(g)
- R(c);XB(B)::QAR1(E),XP(g)
- B(d);XS(G)::QAR1(E),XP(g)
- R(c);::QAB1(E)
- Q(a);::QAB1(E)
- Q(a);::QAR1(E),XP(g)
- B(b);::QAR1(E),XP(g)
- B(d);::QAB1(E)
- Refutation
- Q(a);
- Try
- Q(E);CHECK
- Vars
- B(b);P_SPINB(b)::R(C)
- Refutation
- K(f);N_SPINR(h),P-FLIGHT
- Try
- Q(E);CHECK,N_SPINQ(E),XR(h)
- Vars
- K(f);P-FLIGHT::QAR1(E)
- Refutation
- Q(a);CHECK,P_SPINQ(a),XQ(E)
- Try
- Actual
- R(A);N_SPINQ(E)
- Threat
- DUALS(3)
- Vars
- B(b);CHECK,N_GUARD::R(C),XB(b)
- Q(a);::QAB1(E)
- Q(a);::QAR1(E),XP(g)
- Q(a);::QAB1(E),XP(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).