MESON Chess Problem Database
Problem Display
PID: 180502 (bq2R3/4p3/2P3Q1/2PNkr2/2P4b/1n2B1P1/1n3N2/4R2K w - - 0 1)
Lider, Valentin Viktorovich
Szachy, 1974
#2
11 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qd6
- 2.Qxd6#
- 1...Qa7
- 2.Qd6#
- 1...Qb4
- 2.Qd6#
- 1...Qb5
- 2.Qd6#
- 1...Qb6
- 2.Qd6#
- 1...Qb7
- 2.Qd6#
- 1...Qc8
- 2.Qd6#
- 1...Rxf2
- 2.Bxf2#
- 1...Rf3
- 2.Sg4#
- 2.Qe4#
- 1...Rf4
- 2.gxf4#
- 1...Rg5
- 2.Rxe7#
- 2.Qe4#
- 2.Qf6#
- 1...Rh5
- 2.Sg4#
- 2.Qe4#
- 1...Rf6
- 2.Qe4#
- 1...Rf7
- 2.Sg4#
- 2.Qe4#
- 1...Rf8
- 2.Sg4#
- 2.Qe4#
- 1...Bxg3
- 2.Rxe7#
- 1...Sd4
- 2.Bf4#
- 1...Sxc5
- 2.Bxc5#
- 1...e6
- 2.Rxe6#
- 2.Qxe6#
- 1...Qd6
- Tries
- 1.Qg4?
- threat
- 2.Bc1#
- 2.Bd2#
- 2.Bd4#
- 2.Bg5#
- 2.Bh6#
- 2.Qe4#
- 1...Rxf2
- 2.Bxf2#
- 2.Bd4#
- 1...Sxc4
- 2.Qe4#
- 1...Sxc5
- 2.Bxc5#
- 1...Qb4
- 2.Bd2#
- 2.Bd4#
- 2.Qe4#
- 1...Rf3
- 2.Bd4#
- 2.Qe4#
- 1...Rf4
- 2.gxf4#
- 1...Rg5
- 2.Bc1#
- 2.Bd2#
- 2.Bd4#
- 2.Bxg5#
- 2.Rxe7#
- 2.Qe4#
- 1...Bg5
- 2.Bd4#
- 2.Bxg5#
- 2.Qe4#
- 1...Sd1
- 2.Bd4#
- 2.Qe4#
- 1...Sd3
- 2.Bd4#
- 2.Qe4#
- 1...Sc1
- 2.Bxc1#
- 2.Bd4#
- 2.Qe4#
- 1...Sd2
- 2.Bxd2#
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 2.Bf4#
- 2.Qe4#
- 1...Ke6!
- threat
- 1.g4?
- threat
- 2.Qxf5#
- 1...Rxf2
- 2.Bxf2#
- 1...Sxc5
- 2.Bxc5#
- 1...Rf6
- 2.Qe4#
- 1...Qc8
- 2.Qd6#
- 1...Rf3
- 2.Qe4#
- 1...Rg5
- 2.Rxe7#
- 2.Qe4#
- 2.Qf6#
- 1...Rh5
- 2.Qe4#
- 1...Rf7
- 2.Qe4#
- 1...Rf8
- 2.Qe4#
- 1...Sd4
- 2.Bf4#
- 1...Rf4!
- threat
- 1.Qg4?
- Keys
- 1.Sxe7!
- threat
- 2.Qxf5#
- 1...Bxc6+
- 2.Sxc6#
- 1...Rxf2
- 2.Bxf2#
- 1...Bxe7
- 2.Rxe7#
- 1...Sxc5
- 2.Bxc5#
- 1...Rf6
- 2.Qe4#
- 1...Qc8
- 2.Qd6#
- 1...Rf3
- 2.Sg4#
- 1...Rf4
- 2.gxf4#
- 1...Rg5
- 2.Sc8#
- 1...Rh5
- 2.Sg4#
- 1...Rf7
- 2.Sg4#
- 1...Rf8
- 2.Sg4#
- 1...Sd4
- 2.Bf4#
- threat
- 1.Sxe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 7
- Sets
- Q(h);N_GUARD::QAB1(J),XQ(h)
- Q(h);N_GUARD::QAB1(J)
- R(e);OGATE,XS(C)::R(A)+B(D),XR(e)
- R(e);OGATE::P(E),XR(e)
- R(e);OGATE::QAR1(J)
- B(c);N_GUARD,XP(E)::R(K),XP(f)
- S(b);SBLOCK::R(A)+B(D),DCHECK
- S(b);OGATE,XP(G)::R(A)+B(D),XS(b)
- Tries
- Try
- Q(J);
- Threat
- DUALS(6)
- Vars
- S(a);XP(F)::QAR1(J)
- S(b);OGATE,XP(G)::R(A)+B(D),XS(b)
- R(e);OGATE::P(E),XR(e)
- Refutation
- K(d);P-FLIGHT,P_SPINR(e)
- Try
- P(E);
- Threat
- QAR1(J),XR(e)
- Vars
- R(e);OGATE,XS(C)::R(A)+B(D),XR(e)
- S(b);OGATE,XP(G)::R(A)+B(D),XS(b)
- R(e);OGATE::QAR1(J)
- Q(h);N_GUARD::QAB1(J)
- S(b);SBLOCK::R(A)+B(D),DCHECK
- Refutation
- R(e);
- Try
- Actual
- S(H);P_SPINP(I),XP(f)
- Threat
- QAR1(J),XR(e)
- Vars
- B(g);CHECK,XP(I)::R(K)+S(H),DCHECK,XB(g)
- R(e);OGATE,XS(C)::R(A)+B(D),XR(e)
- B(c);OGATE,P_SPINB(c),XS(H)::R(K),XB(c)
- S(b);OGATE,XP(G)::R(A)+B(D),XS(b)
- R(e);OGATE,SBLOCK::QAR1(J)
- Q(h);N_GUARD::QAB1(J)
- R(e);N_PINP(I)::S(C)
- R(e);OGATE::P(E),XR(e)
- R(e);S_CUTB(c)::R(K)+S(H)
- R(e);::S(C)
- S(b);SBLOCK::R(A)+B(D),DCHECK
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).