MESON Chess Problem Database
Problem Display
PID: 90115 (bB6/2p1pB1P/3p2p1/RP2k1N1/6Pr/p6N/5Q1b/R3K3 w Q - 0 1)
Stelman, Alexey M
Die Schwalbe, 1975
#2
11 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxg4
- 2.h8Q#
- 2.h8B#
- 1...Bg1
- 2.Qf4#
- 1...Bf4
- 2.Qxf4#
- 1...a2
- 2.Qb2#
- 1...d5
- 2.Bxc7#
- 1...c5
- 2.bxc5 ep#
- 1...c6
- 2.bxc6#
- 1...Rxg4
- Tries
- 1.Rd1?
- threat
- 2.Qd4#
- 1...Rxg4
- 2.h8Q#
- 2.h8B#
- 1...d5
- 2.Bxc7#
- 1...Bg1
- 2.Qf4#
- 1...c5
- 2.bxc5 ep#
- 1...Bg3!
- threat
- 1.Qe3+?
- 1...Be4
- 2.Qc3#
- 1...Kf6!
- 1...Be4
- 1.b6+?
- 1...Bd5
- 2.Rxd5#
- 1...d5
- 2.Bxc7#
- 1...c5!
- 1...Bd5
- 1.Rd1?
- Keys
- 1.0-0-0!
- threat
- 2.Qd4#
- 1...Bf4+
- 2.Qxf4#
- 1...Rxg4
- 2.h8Q#
- 2.h8B#
- 1...d5
- 2.Bxc7#
- 1...c5
- 2.bxc5 ep#
- 1...Bg1
- 2.Qf4#
- threat
- 1.0-0-0!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(c);N_GUARD,XP(E)::P=Q
- B(a);N_GUARD::QAB1(C)
- B(a);N_GUARD::QAB1(C),XB(a)
- P(b);N_GUARD::QAB(C)
- P(e);OGATEB,P_SPINP(g)::B(K),XP(g)
- P(g);OGATE,P_SPINP(e)::R(F)+P(G),XP(g),EP
- P(g);OGATE,P_SPINP(e)::R(F)+P(G),XP(g)
- Tries
- Try
- R(A);
- Threat
- QAB1(C)
- Vars
- R(c);N_GUARD,XP(E)::P=Q
- P(e);OGATEB,P_SPINP(g)::B(K),XP(g)
- B(a);N_GUARD::QAB1(C)
- P(g);OGATE,P_SPINP(e)::R(F)+P(G),XP(g),EP
- Refutation
- B(a);P_PINQ(C)
- Try
- Q(C);CHECK
- Vars
- B(i);P_SPINB(i)::QAB(C)
- Refutation
- K(d);S_FLIGHT
- Try
- P(G);CHECK
- Vars
- B(i);N_GUARD,P_SPINB(i)::R1(F),XB(i)
- P(e);P_SPINP(e),S_CUTB(i)::B(K),XP(g)
- Refutation
- P(g);P_SPINP(g)
- Try
- Actual
- K(B);0-0-0
- Threat
- QAB1(C)
- Vars
- B(a);CHECK,N_GUARD::QAB1(C),XB(a)
- R(c);N_GUARD,XP(E)::P=Q
- P(e);OGATEB,P_SPINP(g)::B(K),XP(g)
- P(g);OGATE,P_SPINP(e)::R(F)+P(G),XP(g),EP
- B(a);N_GUARD::QAB1(C)
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).