MESON Chess Problem Database
Problem Display
PID: 88743 (1b1R4/1q6/4P2R/2P1k3/1r2P2N/1B6/rN4QK/1bB5 w - - 0 1)
Levman, Semyon Semyonovich
The Problemist, 1940
#2
11 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Qg7#
- 1...Qd5
- 2.Rxd5#
- 1...Qa6
- 2.Rd5#
- 1...Qc8
- 2.Rd5#
- 1...Qb5
- 2.Rd5#
- 1...Qb6
- 2.Rd5#
- 1...Qa7
- 2.Rd5#
- 1...Qc7
- 2.Rd5#
- 1...Qe7
- 2.Rd5#
- 1...Qf7
- 2.Rd5#
- 1...Qg7
- 2.Rd5#
- 1...Qh7
- 2.Rd5#
- 1...Rxb3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Rxe4
- 2.Qg5#
- 1...Rb5
- 2.Sc4#
- 1...Rb6
- 2.Sc4#
- 1...Bd3
- 2.Sxd3#
- 1...Bxe4
- 2.Qg3#
- 1...Qxe4
- Tries
- 1.Bc2?
- threat
- 2.Sd3#
- 2.Sf3#
- 2.Qg3#
- 2.Qg5#
- 1...Qxe4
- 2.Qg7#
- 1...Raxb2
- 2.Sf3#
- 2.Qg3#
- 2.Qg5#
- 1...Rbxb2
- 2.Sf3#
- 2.Qg3#
- 2.Qg5#
- 1...Rxe4
- 2.Sd3#
- 2.Qg5#
- 1...Qd5
- 2.Sf3#
- 2.Rxd5#
- 2.Qg7#
- 1...Qd7
- 2.Sf3#
- 1...Bd6
- 2.Sf3#
- 1...Qa6
- 2.Sf3#
- 2.Rd5#
- 2.Qg3#
- 2.Qg5#
- 2.Qg7#
- 1...Qb5
- 2.Sf3#
- 2.Rd5#
- 2.Qg3#
- 2.Qg5#
- 2.Qg7#
- 1...Qe7
- 2.Sd3#
- 2.Sf3#
- 2.Rd5#
- 2.Qg3#
- 1...Qf7
- 2.Sd3#
- 2.Rd5#
- 1...Qg7
- 2.Sd3#
- 2.Sf3#
- 2.Rd5#
- 2.Qxg7#
- 1...Qh7
- 2.Sd3#
- 2.Sf3#
- 2.Rd5#
- 2.Qg3#
- 1...Ra3
- 2.Qg5#
- 1...Rb3
- 2.Sc4#
- 2.Qg5#
- 1...Rd4
- 2.Sf3#
- 2.Qg3#
- 2.Qg5#
- 1...Bxc2!
- threat
- 1.Qg4?
- threat
- 2.Sf3#
- 2.Qf5#
- 2.Qf4#
- 1...Qxe4
- 2.Qg7#
- 1...Rxb3
- 2.Qf5#
- 2.Qf4#
- 1...Rxe4
- 2.Sf3#
- 2.Qf5#
- 2.Qh5#
- 2.Qg5#
- 1...Bxe4
- 2.Bf4#
- 2.Qg3#
- 2.Qf4#
- 1...Qd5
- 2.Sf3#
- 2.Rxd5#
- 1...Qd7
- 2.Sf3#
- 1...Bd6
- 2.Sf3#
- 1...Qf7
- 2.Rd5#
- 1...Qh7
- 2.Sf3#
- 2.Rd5#
- 2.Qf4#
- 1...Rxb2+!
- threat
- 1.Qg6?
- threat
- 2.Sf3#
- 2.Rh5#
- 2.Qf5#
- 1...Qxe4
- 2.Qf6#
- 2.Qg7#
- 1...Rxb3
- 2.Rh5#
- 2.Qf5#
- 1...Bxe4
- 2.Qg3#
- 2.Qf6#
- 1...Qd5
- 2.Sf3#
- 2.Rxd5#
- 1...Qd7
- 2.Sf3#
- 1...Bd6
- 2.Sf3#
- 1...Qe7
- 2.Sf3#
- 2.Rd5#
- 2.Qf5#
- 1...Qf7
- 2.Rd5#
- 1...Qh7
- 2.Sf3#
- 2.Rd5#
- 1...Rxb2+!
- threat
- 1.Bc2?
- Keys
- 1.Qe2!
- threat
- 2.Sf3#
- 1...Qxe4
- 2.Rd5#
- 1...Rxb3
- 2.Sc4#
- 1...Rxe4
- 2.Sc4#
- 2.Qh5#
- 1...Bxe4
- 2.Sd3#
- 1...Qf7
- 2.Rd5#
- threat
- 1.Qe2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 15
- Sets
- Q(e);N_GUARD,SBLOCK,XP(F)::QAB(C)
- Q(e);N_GUARD::R1(K),XQ(e)
- Q(e);N_GUARD::R1(K)
- R(c);N_GUARD,XB(E)::S(B)
- R(c);N_GUARD::S(B),XR(c)
- R(c);SBLOCK,XP(F)::QAR2(C)
- R(c);N_GUARD::S(B)
- B(a);N_GUARD::S(B),XB(a)
- B(a);SBLOCK,XP(F)::QAB(C)
- Tries
- Try
- B(E);
- Threat
- DUALS(4)
- Vars
- Q(e);N_GUARD,XP(F)::QAB(C)
- Q(e);::S(G)
- B(f);::S(G)
- R(b);::QAR2(C)
- Refutation
- B(a);XB(E)
- Try
- Q(C);P_SPINS(B)
- Threat
- DUALS(3)
- Vars
- Q(e);N_GUARD,SBLOCK,XP(F)::QAB(C)
- Q(e);::S(G)
- B(f);::S(G)
- Q(e);N_GUARD::R1(K)
- Refutation
- R(b);CHECK,XS(B)
- Try
- Q(C);P_SPINS(B)
- Threat
- DUALS(3)
- Vars
- Q(e);::S(G)
- B(f);::S(G)
- Q(e);N_GUARD::R1(K)
- Refutation
- R(b);CHECK,XS(B)
- Try
- Actual
- Q(C);
- Threat
- S(G)
- Vars
- Q(e);N_GUARD,P_SPINQ(e),XP(F)::R1(K)
- R(c);N_GUARD,XB(E)::S(B)
- B(a);N_GUARD,P_SPINB(a),XP(F)::S(B)
- Q(e);N_GUARD::R1(K)
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).