MESON Chess Problem Database
Problem Display
PID: 237768 (3N4/2p4p/2p2ppP/2R1bkPb/5P2/4Bp2/3N1K2/6Q1 w - - 0 1)
Erokhin, Vladimir Alekseevich
Shakhmaty v SSSR, 1980
#2
9 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Bg4
- 2.Qb1#
- 1...fxg5
- 2.Qxg5#
- 1...Bg4
- Tries
- 1.Sb3?
- 1...Ke4
- 2.Qb1#
- 1...Bg4
- 2.Qb1#
- 1...fxg5!
- 1...Ke4
- 1.Sc4?
- 1...Ke4
- 2.Qb1#
- 1...Bg4
- 2.Qb1#
- 1...fxg5!
- 1...Ke4
- 1.Ra5?
- 1...fxg5
- 2.Qxg5#
- 1...Bg4
- 2.Qb1#
- 1...c5!
- 1...fxg5
- 1.Qg3?
- 1...fxg5
- 2.Qxg5#
- 1...Bg4!
- 1...fxg5
- 1.fxe5?
- threat
- 2.exf6#
- 2.e6#
- 1...fxg5
- 2.Qxg5#
- 1...fxe5!
- threat
- 1.gxf6?
- threat
- 2.Qg5#
- 1...Kxf6
- 2.Qg5#
- 1...g5
- 2.Qxg5#
- 1...Bg4!
- threat
- 1.Sb3?
- Keys
- 1.Se4!
- 1...Kxe4
- 2.Qb1#
- 1...fxg5
- 2.Rxe5#
- 1...Bg4
- 2.Sg3#
- 1...Kxe4
- 1.Se4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(d);SBLOCK::QAB(A)
- P(f);OGATE,XP(G)::QAR1(A),XP(f)
- Tries
- Try
- S(B);
- Vars
- K(c);N_SPINB(b),S_FLIGHT::QAB(A)
- B(d);SBLOCK::QAB(A)
- Refutation
- P(f);XP(G)
- Try
- S(B);
- Vars
- K(c);N_SPINB(b),S_FLIGHT::QAB(A)
- B(d);SBLOCK::QAB(A)
- Refutation
- P(f);XP(G)
- Try
- R(F);
- Vars
- P(f);OGATE,XP(G)::QAR1(A),XP(f)
- B(d);SBLOCK::QAB(A)
- Refutation
- P(e);N_SPINB(b)
- Try
- Q(A);
- Vars
- P(f);OGATE,XP(G)::QAR1(A),XP(f)
- Refutation
- B(d);
- Try
- P(E);XB(b)
- Threat
- DUALS(2)
- Vars
- P(f);OGATE,XP(G)::QAR1(A),XP(f)
- Refutation
- P(f);P_SPINP(f),XP(E)
- Try
- P(G);XP(f)
- Threat
- QAR1(A)
- Vars
- K(c);N_SPINB(b),P-FLIGHT,XP(G)::QAB1(A)
- P(g);::QAR1(A),XP(g)
- Refutation
- B(d);
- Try
- Actual
- S(B);
- Vars
- K(c);N_SPINB(b),OGATEB,S_FLIGHT,XS(B)::QAB(A)
- P(f);N_GUARD,XP(G)::R1(F),XB(b)
- B(d);SBLOCK::S(B)
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).