MESON Chess Problem Database
Problem Display
PID: 180317 (8/8/4PKP1/3Q1P1p/2nRBNkr/1q3Rpp/4PrNP/3b4 w - - 0 1)
Lider, Valentin Viktorovich
1/2 HM., diagrammes, 1974
#2
12 + 9
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Rxg3#
- 1...Qc2
- 2.Rxg3#
- 1...Qa4
- 2.Rxg3#
- 1...Qb1
- 2.Rxg3#
- 1...Qb2
- 2.Rxg3#
- 1...Qb4
- 2.Rxg3#
- 1...Qb5
- 2.Rxg3#
- 1...Qb6
- 2.Rxg3#
- 1...Qb7
- 2.Rxg3#
- 1...Qb8
- 2.Rxg3#
- 1...Se3
- 2.Rxg3#
- 1...Qa2
- Tries
- 1.Sd3?
- threat
- 2.Rxg3#
- 1...Qxd3
- 2.Bxd3#
- 1...Rxg2
- 2.Rf4#
- 1...Rxf3
- 2.Bxf3#
- 1...gxh2
- 2.Sxf2#
- 1...Qb8!
- threat
- 1.g7?
- threat
- 2.g8Q#
- 2.g8R#
- 1...Qxf3
- 2.g8Q#
- 2.g8R#
- 1...Rxe2
- 2.g8Q#
- 2.g8R#
- 1...Rxg2
- 2.g8Q#
- 2.g8R#
- 1...Rxf3
- 2.g8Q#
- 2.g8R#
- 1...Bxe2
- 2.g8Q#
- 2.g8R#
- 1...gxh2
- 2.g8Q#
- 2.g8R#
- 1...hxg2
- 2.g8Q#
- 2.g8R#
- 1...Qa2
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Qc2
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Qa4
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Qb1
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Qb2
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Qa3
- 2.g8Q#
- 2.g8R#
- 1...Qc3
- 2.g8Q#
- 2.g8R#
- 1...Qd3
- 2.g8Q#
- 2.g8R#
- 1...Qe3
- 2.g8Q#
- 2.g8R#
- 1...Qb4
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Qb5
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Qb6
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Qb7
- 2.Rxg3#
- 1...Qb8
- 2.Rxg3#
- 1...Rf1
- 2.g8Q#
- 2.g8R#
- 1...Bc2
- 2.g8Q#
- 2.g8R#
- 1...Sb2
- 2.g8Q#
- 2.g8R#
- 1...Sd2
- 2.g8Q#
- 2.g8R#
- 1...Sa3
- 2.g8Q#
- 2.g8R#
- 1...Se3
- 2.Rxg3#
- 2.g8Q#
- 2.g8R#
- 1...Sa5
- 2.g8Q#
- 2.g8R#
- 1...Sb6
- 2.g8Q#
- 2.g8R#
- 1...Sd6
- 2.g8Q#
- 2.g8R#
- 1...Se5!
- threat
- 1.Sd3?
- Keys
- 1.Bd3!
- threat
- 2.Rxg3#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxg2
- 2.Sxg2#
- 1...Rxf3
- 2.Qxf3#
- 1...gxh2
- 2.Sxh3#
- threat
- 1.Bd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 11
- Sets
- Q(c);N_GUARD::R1(D),XP(d)
- Q(c);N_GUARD,P_PINR(E)::R1(D),XP(d)
- Q(c);N_GUARD,P_PINP(J)::R1(D),XP(d)
- S(f);S_CUTQ(c)::R1(D),XP(d)
- Tries
- Try
- S(G);
- Threat
- R1(D),XP(d)
- Vars
- Q(c);OGATE,XS(G)::R(E)+B(F),XQ(c)
- R(b);N_GUARD,XS(B)::R1(D)
- R(b);OGATE,P_PINP(I),XR(D)::R(E)+B(F),DCHECK,XR(b)
- P(d);N_GUARD,XP(C)::S(G),XR(b)
- Refutation
- Q(c);
- Try
- P(L);
- Threat
- P=Q
- Vars
- Q(c);XR(D)::P=Q
- R(b);XP(A)::P=Q
- R(b);XS(B)::P=Q
- R(b);XR(D)::P=Q
- B(a);XP(A)::P=Q
- P(d);XP(C)::P=Q
- P(e);XS(B)::P=Q
- Q(c);::P=Q
- Q(c);P_PINR(E)::P=Q
- Q(c);N_GUARD::R1(D),XP(d)
- R(b);::P=Q
- B(a);::P=Q
- S(f);::P=Q
- Refutation
- S(f);
- Try
- Actual
- B(F);
- Threat
- R1(D),XP(d)
- Vars
- Q(c);XB(F)::R(E)+S(G),XQ(c)
- R(b);XS(B)::R(E)+S(G),XR(b)
- R(b);OGATE,XR(D)::QAB1(H),XR(b)
- P(d);XP(C)::R(E)+S(G),XP(e)
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).