MESON Chess Problem Database
Problem Display
PID: 11301 (2qbR1N1/2pr3b/4BQn1/r2N2K1/4kB2/2P1P3/2n1P3/8 w - - 0 1)
Korepin, Aleksandr
2nd Prize, 64 Shakhmatnoe obozrenie, 1938
#2
10 + 9
| 3098 | FIDE Album (1914-1944) (I) | 1971 |
| 23 | Die Schwalbe | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Raxd5+
- 2.Bf5#
- 1...Rdxd5+
- 2.Bf5#
- 1...Re7
- 2.Qf5#
- 1...Bxf6+
- 2.Sxf6#
- 1...Se7
- 2.Qe5#
- 1...Raxd5+
- Tries
- 1.Kh5?
- threat
- 2.Qf5#
- 1...Raxd5+
- 2.Bf5#
- 1...Rdxd5+
- 2.Bf5#
- 1...Sxf4+
- 2.Qxf4#
- 1...Bxf6
- 2.Sxf6#
- 1...Sxe3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Se7
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...Rf7!
- threat
- 1.Kh6?
- threat
- 2.Qf5#
- 1...Raxd5
- 2.Bf5#
- 1...Rdxd5
- 2.Bf5#
- 1...Bxf6
- 2.Sdxf6#
- 2.Sgxf6#
- 1...Sxe3
- 2.Qd4#
- 1...Sxf4
- 2.Qxf4#
- 1...Sd4
- 2.Qxd4#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Se7
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...Rf7!
- threat
- 1.Bh3+?
- 1...Re7
- 2.Bg2#
- 1...Be7
- 2.Bg2#
- 1...Se5
- 2.Bg2#
- 2.Rxe5#
- 1...Se7
- 2.Bg2#
- 2.Qe5#
- 2.Qe6#
- 1...Kxd5!
- 1...Re7
- 1.Bg4+?
- 1...Re7
- 2.Bf3#
- 1...Be7
- 2.Bf3#
- 1...Se5
- 2.Bf3#
- 2.Rxe5#
- 1...Se7
- 2.Bf3#
- 2.Qe5#
- 2.Qe6#
- 1...Kxd5!
- 1...Re7
- 1.Re7?
- threat
- 2.Qf5#
- 1...Raxd5+
- 2.Bf5#
- 1...Rdxd5+
- 2.Bf5#
- 1...Sxe3
- 2.Qd4#
- 1...Sxf4
- 2.Qxf4#
- 1...Sxe7
- 2.Qe5#
- 1...Sd4
- 2.Qxd4#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sf8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...Bxe7!
- threat
- 1.Kh5?
- Keys
- 1.c4!
- threat
- 2.Bf5#
- 1...Bxf6+
- 2.Sxf6#
- 1...Re7
- 2.Qf5#
- 1...Se5
- 2.Sc3#
- 1...Se7
- 2.Qe5#
- threat
- 1.c4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(c);CHECK,SBLOCK,XS(E)::R(I)+B(G),DCHECK
- R(f);CHECK,SBLOCK,XS(E)::R(I)+B(G),DCHECK
- R(f);N_PINQ(H)::QAB1(H)
- B(i);CHECK,XQ(H)::S(J),XB(i)
- S(d);N_PINQ(H)::QAR1(H)
- Tries
- Try
- K(F);N_SPINQ(H),P-FLIGHT
- Threat
- QAB1(H)
- Vars
- R(c);CHECK,SBLOCK,XS(E)::R(I)+B(G),DCHECK
- R(f);CHECK,SBLOCK,XS(E)::R(I)+B(G),DCHECK
- S(d);CHECK,OGATE,XB(D)::QAR1(H),XS(d)
- B(i);XQ(H)::S(J),XB(i)
- S(a);N_GUARD,XP(C)::QAR1(H)
- S(a);N_GUARD::QAR1(H),XS(a)
- S(d);N_GUARD::QAR1(H)
- S(d);N_GUARD,N_PINS(E)::QAR1(H),XS(d)
- Refutation
- R(f);
- Try
- K(F);N_SPINQ(H),N_SPINS(E),S_FLIGHT
- Threat
- QAB1(H)
- Vars
- R(c);SBLOCK,XS(E)::R(I)+B(G),DCHECK
- R(f);SBLOCK,XS(E)::R(I)+B(G),DCHECK
- S(a);N_GUARD,XP(C)::QAR1(H)
- S(d);OGATE,XB(D)::QAR1(H),XS(d)
- S(a);N_GUARD::QAR1(H),XS(a)
- S(d);N_GUARD::QAR1(H)
- S(d);N_GUARD::QAR1(H),XS(d)
- Refutation
- R(f);
- Try
- B(G);CHECK
- Vars
- R(f);N_PINQ(H),P_SPINR(f)::B(G)
- B(i);P_SPINB(i)::B(G)
- Refutation
- K(b);S_FLIGHT,XS(E)
- Try
- B(G);CHECK
- Vars
- R(f);N_PINQ(H),P_SPINR(f)::B(G)
- B(i);P_SPINB(i)::B(G)
- Refutation
- K(b);S_FLIGHT,XS(E)
- Try
- R(I);N_SPINQ(H)
- Threat
- QAB1(H)
- Vars
- R(c);CHECK,SBLOCK,XS(E)::R(I)+B(G),DCHECK
- R(f);CHECK,SBLOCK,XS(E)::R(I)+B(G),DCHECK
- S(a);N_GUARD,XP(C)::QAR1(H)
- S(d);OGATE,XB(D)::QAR1(H),XS(d)
- S(d);N_GUARD,XR(I)::QAR1(H)
- S(a);N_GUARD::QAR1(H),XS(a)
- S(d);N_GUARD::QAR1(H)
- S(d);N_GUARD,N_PINS(E)::QAR1(H),XS(d)
- Refutation
- B(i);P_PINQ(H),XR(I)
- Try
- Actual
- P(B);
- Threat
- R(I)+B(G),DCHECK
- Vars
- B(i);CHECK,XQ(H)::S(J),XB(i)
- R(f);N_PINQ(H)::QAB1(H)
- S(d);N_PINS(E)::S(E)
- S(d);N_PINQ(H)::QAR1(H)
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).