MESON Chess Problem Database
Problem Display
PID: 91696 (1b2R3/4N1Q1/4q3/r7/3R4/2BBk2n/p1n1P3/rb3K2 w - - 0 1)
Krikheli, Iosif Mikhailovich
Probleemblad, 1975
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qb3
- 2.Sd5#
- 2.Sf5#
- 2.Re4#
- 1...Qc4
- 2.Sd5#
- 2.Sf5#
- 1...Qg4
- 2.Sd5#
- 2.Sf5#
- 1...Qd5
- 2.Sxd5#
- 2.Sf5#
- 1...Qf5+
- 2.Sxf5#
- 1...Qd7
- 2.Sd5#
- 2.Sf5#
- 2.Re4#
- 1...Qf7+
- 2.Sf5#
- 1...Qc8
- 2.Sd5#
- 2.Sf5#
- 2.Re4#
- 1...Qg8
- 2.Sd5#
- 2.Sf5#
- 2.Re4#
- 1...Qe4
- 2.Rxe4#
- 1...Qe5
- 2.Sf5#
- 1...Qa6
- 2.Sd5#
- 2.Sf5#
- 2.Re4#
- 1...Qb6
- 2.Sd5#
- 2.Sf5#
- 2.Re4#
- 1...Qc6
- 2.Sd5#
- 2.Sf5#
- 1...Qd6
- 2.Sd5#
- 2.Sf5#
- 2.Re4#
- 1...Qf6+
- 2.Sf5#
- 1...Qg6
- 2.Sd5#
- 2.Sf5#
- 1...Qh6
- 2.Sd5#
- 2.Sf5#
- 2.Re4#
- 1...Ra3
- 2.Sd5#
- 2.Sf5#
- 1...Ra4
- 2.Sd5#
- 2.Sf5#
- 1...Rd5
- 2.Sxd5#
- 1...Re5
- 2.Qg3#
- 1...Rf5+
- 2.Sxf5#
- 1...Ra6
- 2.Sd5#
- 2.Sf5#
- 1...Ra7
- 2.Sd5#
- 2.Sf5#
- 1...Ra8
- 2.Sd5#
- 2.Sf5#
- 1...Bg3
- 2.Qxg3#
- 1...Be5
- 2.Re4#
- 1...Ba7
- 2.Qg3#
- 1...Sxd4
- 2.Qxd4#
- 1...Sg1
- 2.Qxg1#
- 1...Sf4
- 2.Qg1#
- 2.Qg3#
- 1...Qb3
- Tries
- 1.Bxc2?
- threat
- 2.Bd2#
- 1...Qf5+
- 2.Sxf5#
- 1...Qf7+
- 2.Sf5#
- 1...Qf6+
- 2.Sf5#
- 1...Rf5+
- 2.Sxf5#
- 1...Qe5
- 2.Sf5#
- 1...Re5
- 2.Qg3#
- 1...Be5
- 2.Re4#
- 1...Bxc2+!
- threat
- 1.Bc4?
- threat
- 2.Bd2#
- 1...Qf5+
- 2.Sxf5#
- 1...Qf7+
- 2.Sf5#
- 1...Qf6+
- 2.Sf5#
- 1...Rf5+
- 2.Sxf5#
- 1...Sxd4
- 2.Qxd4#
- 1...Qe5
- 2.Sf5#
- 1...Re5
- 2.Qg3#
- 1...Be5!
- threat
- 1.Bb5?
- threat
- 2.Sd5#
- 2.Sf5#
- 2.Bd2#
- 1...Qf5+
- 2.Sxf5#
- 1...Qf7+
- 2.Sf5#
- 1...Qf6+
- 2.Sf5#
- 1...Qxe7
- 2.Bd2#
- 1...Rxb5
- 2.Bd2#
- 1...Sxd4
- 2.Qxd4#
- 1...Qe4
- 2.Sd5#
- 2.Bd2#
- 1...Qd5
- 2.Sxd5#
- 2.Sf5#
- 2.Bd2#
- 1...Qe5
- 2.Sd5#
- 2.Sf5#
- 1...Se1
- 2.Sd5#
- 2.Bd2#
- 1...Sa3
- 2.Sd5#
- 2.Bd2#
- 1...Sb4
- 2.Bd2#
- 1...Sf4
- 2.Sf5#
- 2.Bd2#
- 2.Qg1#
- 2.Qg3#
- 1...Be5!
- threat
- 1.Bf5?
- threat
- 2.Bd2#
- 1...Qxf5+
- 2.Sxf5#
- 1...Rxf5+
- 2.Sxf5#
- 1...Sxd4
- 2.Qxd4#
- 1...Be5
- 2.Re4#
- 1...Qf6
- 2.Sd5#
- 2.Re4#
- 1...Re5
- 2.Qg3#
- 1...Qe5!
- threat
- 1.Ba6?
- threat
- 2.Bd2#
- 1...Qf5+
- 2.Sxf5#
- 1...Qf7+
- 2.Sf5#
- 1...Qf6+
- 2.Sf5#
- 1...Rf5+
- 2.Sxf5#
- 1...Sxd4
- 2.Qxd4#
- 1...Qe5
- 2.Sf5#
- 1...Re5
- 2.Qg3#
- 1...Be5!
- threat
- 1.Bg6?
- threat
- 2.Bd2#
- 1...Qf5+
- 2.Sxf5#
- 1...Qf7+
- 2.Sf5#
- 1...Qf6+
- 2.Sf5#
- 1...Rf5+
- 2.Sxf5#
- 1...Sxd4
- 2.Qxd4#
- 1...Be5
- 2.Re4#
- 1...Qe5
- 2.Sf5#
- 1...Re5!
- threat
- 1.Qe5+?
- 1...Qxe5
- 2.Sf5#
- 1...Bxe5
- 2.Re4#
- 1...Rxe5!
- 1...Qxe5
- 1.Qg1+?
- 1...Sf2
- 2.Qxf2#
- 1...Sxg1!
- 1...Sf2
- 1.Qg4?
- threat
- 2.Qf3#
- 1...Qf5+
- 2.Sxf5#
- 1...Qf7+
- 2.Sf5#
- 1...Qf6+
- 2.Sf5#
- 1...Rf5+
- 2.Sxf5#
- 1...Qxg4
- 2.Sd5#
- 2.Sf5#
- 1...Sxd4
- 2.Qxd4#
- 1...Qd5
- 2.Sxd5#
- 2.Sf5#
- 1...Qe4
- 2.Rxe4#
- 2.Qxe4#
- 1...Qc6
- 2.Sd5#
- 2.Sf5#
- 1...Sg1
- 2.Qxg1#
- 1...Sg5
- 2.Qg1#
- 1...Se1!
- threat
- 1.Bxc2?
- Keys
- 1.Bh7!
- threat
- 2.Bd2#
- 1...Qf5+
- 2.Sxf5#
- 1...Qf7+
- 2.Sf5#
- 1...Qf6+
- 2.Sf5#
- 1...Rf5+
- 2.Sxf5#
- 1...Sxd4
- 2.Qxd4#
- 1...Be5
- 2.Re4#
- 1...Qe5
- 2.Sf5#
- 1...Re5
- 2.Qg3#
- threat
- 1.Bh7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- Q(h);CHECK::R(H)+S(F),DCHECK,XQ(h)
- Q(h);CHECK::R(H)+S(F),DCHECK
- Q(h);N_GUARD::R1(E),XQ(h)
- Q(h);S_CUTR(g)::S(F)
- R(g);N_GUARD::S(F),XR(g)
- R(g);S_CUTB(i)::QAR2(G)
- R(g);CHECK,N_GUARD::S(F),XR(g)
- B(i);N_GUARD::QAR2(G),XB(i)
- B(i);S_CUTQ(h)::R1(E)
- B(i);N_GUARD::QAR2(G)
- S(d);OGATE,XR(E)::QAB1(G),XS(d)
- S(f);N_GUARD::QAB(G),XS(f)
- Tries
- Try
- B(D);XS(d)
- Threat
- B(C)
- Vars
- Q(h);CHECK::R(H)+S(F),DCHECK,XQ(h)
- Q(h);CHECK::R(H)+S(F),DCHECK
- R(g);CHECK,N_GUARD::S(F),XR(g)
- Q(h);S_CUTR(g)::S(F)
- R(g);S_CUTB(i)::QAR2(G)
- B(i);S_CUTQ(h)::R1(E)
- Refutation
- B(b);CHECK,XB(D)
- Try
- B(D);
- Threat
- B(C)
- Vars
- Q(h);CHECK::R(H)+S(F),DCHECK,XQ(h)
- Q(h);CHECK::R(H)+S(F),DCHECK
- R(g);CHECK,N_GUARD::S(F),XR(g)
- S(d);OGATE,XR(E)::QAB1(G),XS(d)
- Q(h);S_CUTR(g)::S(F)
- R(g);S_CUTB(i)::QAR2(G)
- Refutation
- B(i);
- Try
- B(D);
- Threat
- DUALS(3)
- Vars
- Q(h);CHECK::R(H)+S(F),DCHECK,XQ(h)
- Q(h);CHECK::R(H)+S(F),DCHECK
- Q(h);P_SPINQ(h),XS(F)::B(C)
- R(g);XB(D)::B(C)
- S(d);OGATE,XR(E)::QAB1(G),XS(d)
- S(d);::B(C)
- Refutation
- B(i);
- Try
- B(D);
- Threat
- B(C)
- Vars
- Q(h);CHECK,XB(D)::R(H)+S(F),DCHECK,XQ(h)
- R(g);CHECK,XB(D)::S(F),XR(g)
- S(d);OGATE,XR(E)::QAB1(G),XS(d)
- B(i);S_CUTQ(h)::R1(E)
- R(g);S_CUTB(i)::QAR2(G)
- Refutation
- Q(h);
- Try
- B(D);
- Threat
- B(C)
- Vars
- Q(h);CHECK::R(H)+S(F),DCHECK,XQ(h)
- Q(h);CHECK::R(H)+S(F),DCHECK
- R(g);CHECK,N_GUARD::S(F),XR(g)
- S(d);OGATE,XR(E)::QAB1(G),XS(d)
- Q(h);S_CUTR(g)::S(F)
- R(g);S_CUTB(i)::QAR2(G)
- Refutation
- B(i);
- Try
- B(D);
- Threat
- B(C)
- Vars
- Q(h);CHECK::R(H)+S(F),DCHECK,XQ(h)
- Q(h);CHECK::R(H)+S(F),DCHECK
- R(g);CHECK,N_GUARD::S(F),XR(g)
- S(d);OGATE,XR(E)::QAB1(G),XS(d)
- B(i);S_CUTQ(h)::R1(E)
- Q(h);S_CUTR(g)::S(F)
- Refutation
- R(g);
- Try
- Q(G);CHECK
- Vars
- Q(h);XQ(G)::S(F)
- B(i);XQ(G)::R1(E)
- Refutation
- R(g);XQ(G)
- Try
- Q(G);CHECK
- Vars
- S(f);N_GUARD,P_SPINS(f)::QAB1(G),XS(f)
- Refutation
- S(f);XQ(G)
- Try
- Q(G);
- Threat
- QAR1(G)
- Vars
- Q(h);CHECK::R(H)+S(F),DCHECK,XQ(h)
- Q(h);CHECK::R(H)+S(F),DCHECK
- R(g);CHECK,N_GUARD::S(F),XR(g)
- S(d);OGATE,XR(E)::QAB1(G),XS(d)
- S(f);N_GUARD::QAB(G),XS(f)
- S(f);N_GUARD::QAB(G)
- Refutation
- S(d);
- Try
- Actual
- B(D);
- Threat
- B(C)
- Vars
- Q(h);CHECK::R(H)+S(F),DCHECK,XQ(h)
- Q(h);CHECK::R(H)+S(F),DCHECK
- R(g);CHECK,N_GUARD::S(F),XR(g)
- S(d);OGATE,XR(E)::QAB1(G),XS(d)
- B(i);S_CUTQ(h)::R1(E)
- Q(h);S_CUTR(g)::S(F)
- R(g);S_CUTB(i)::QAR2(G)
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).