MESON Chess Problem Database
Problem Display
PID: 180305 (8/6p1/B1K5/5Pp1/RP1k1rNQ/Rn2NP2/3P2P1/n7 w - - 0 1)
Lider, Valentin Viktorovich
diagrammes, 1977
#2
12 + 6
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxf5
- 2.Sxf5#
- 1...Sc2
- 2.Sxc2#
- 1...Sc1
- 2.b5#
- 1...Sxd2
- 2.Rd3#
- 1...Sa5+
- 2.bxa5#
- 1...Sc5
- 2.bxc5#
- 1...g6
- 2.Qh8#
- 1...Rxf5
- Tries
- 1.Bf1?
- threat
- 2.b5#
- 1...Sa5+
- 2.bxa5#
- 1...Sxd2
- 2.Rd3#
- 1...Sc2
- 2.Sxc2#
- 1...Sc5
- 2.bxc5#
- 1...Rxg4!
- threat
- 1.Be2?
- threat
- 2.b5#
- 1...Sa5+
- 2.bxa5#
- 1...Sxd2
- 2.Rd3#
- 1...Sc2
- 2.Sxc2#
- 1...Sc5
- 2.bxc5#
- 1...Rxg4!
- threat
- 1.Rxb3?
- threat
- 2.Rd3#
- 2.b5#
- 1...Rxf3
- 2.b5#
- 1...Sxb3
- 2.Sc2#
- 1...Sc2
- 2.Sxc2#
- 2.Rd3#
- 1...Rxg4!
- threat
- 1.Qf2?
- threat
- 2.Sd1#
- 2.Sf1#
- 2.Sc2#
- 2.Sd5#
- 1...Sa5+
- 2.bxa5#
- 1...Rxg4
- 2.Sxg4#
- 1...Re4
- 2.Sc2#
- 1...Sc2
- 2.Sxc2#
- 1...Rxf3!
- threat
- 1.Qg3?
- 1...Sa5+
- 2.bxa5#
- 1...Rxf3
- 2.Qe5#
- 1...Rxg4
- 2.Qd6#
- 1...Rxf5
- 2.Sxf5#
- 1...Sxd2
- 2.Rd3#
- 1...Re4
- 2.Qd6#
- 1...Sc2
- 2.Sxc2#
- 1...Sc1
- 2.b5#
- 1...Sc5
- 2.bxc5#
- 1...g6!
- 1...Sa5+
- 1.Qh8?
- threat
- 2.Qxg7#
- 2.Qd8#
- 1...Sa5+
- 2.bxa5#
- 1...Rxg4
- 2.Qxg7#
- 1...Rxf5
- 2.Sxf5#
- 1...Re4
- 2.Qd8#
- 1...Sc5
- 2.Qxg7#
- 2.bxc5#
- 1...Rxf3!
- threat
- 1.Bf1?
- Keys
- 1.Qh2!
- 1...Sa5+
- 2.bxa5#
- 1...Rxf3
- 2.Qe5#
- 1...Rxg4
- 2.Qd6#
- 1...Rxf5
- 2.Sxf5#
- 1...Sxd2
- 2.Rd3#
- 1...Re4
- 2.Qd6#
- 1...Sc2
- 2.Sxc2#
- 1...Sc1
- 2.b5#
- 1...Sc5
- 2.bxc5#
- 1...g6
- 2.Qh8#
- 1...Sa5+
- 1.Qh2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(d);XP(J)::S(D),XR(d)
- S(a);N_GUARD::S(D),XS(a)
- S(b);::R(F)+P(G)
- S(b);OGATE,XP(A)::R1(C)
- S(b);CHECK,OGATE::R(F)+P(G),XS(b)
- S(b);OGATE::R(F)+P(G),XS(b)
- P(f);OGATEB::QAB(I)
- Tries
- Try
- B(K);
- Threat
- R(F)+P(G)
- Vars
- S(b);CHECK,OGATE::R(F)+P(G),XS(b)
- S(b);OGATE,XP(A)::R1(C)
- S(a);N_GUARD::S(D),XS(a)
- S(b);OGATE::R(F)+P(G),XS(b)
- Refutation
- R(d);P_SPINR(d),XS(H)
- Try
- B(K);
- Threat
- R(F)+P(G)
- Vars
- S(b);CHECK,OGATE::R(F)+P(G),XS(b)
- S(b);OGATE,XP(A)::R1(C)
- S(a);N_GUARD::S(D),XS(a)
- S(b);OGATE::R(F)+P(G),XS(b)
- Refutation
- R(d);P_SPINR(d),XS(H)
- Try
- R(C);XS(b)
- Threat
- DUALS(2)
- Vars
- R(d);XP(E)::R(F)+P(G)
- S(a);N_GUARD,XR(C)::S(D)
- Refutation
- R(d);P_SPINR(d),XS(H)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- S(b);CHECK,OGATE::R(F)+P(G),XS(b)
- R(d);XS(H)::QAB(I)+S(D),XR(d)
- R(d);::QAB(I)+S(D),DCHECK
- S(a);::QAB(I)+S(D),DCHECK,XS(a)
- Refutation
- R(d);XP(E)
- Try
- Q(I);
- Vars
- S(b);CHECK,OGATE::R(F)+P(G),XS(b)
- R(d);OGATE,XP(E)::QAB1(I)
- R(d);OGATE,XS(H)::QAR2(I)
- R(d);XP(J)::S(D),XR(d)
- S(b);OGATE,XP(A)::R1(C)
- R(d);OGATE::QAR2(I)
- S(a);N_GUARD::S(D),XS(a)
- S(b);::R(F)+P(G)
- S(b);OGATE::R(F)+P(G),XS(b)
- Refutation
- P(f);
- Try
- Q(I);P_PINP(f)
- Threat
- DUALS(2)
- Vars
- S(b);CHECK,OGATE::R(F)+P(G),XS(b)
- R(d);XS(H)::QAB(I),XP(f)
- R(d);XP(J)::S(D),XR(d)
- R(d);::QAR(I)
- Refutation
- R(d);XP(E)
- Try
- Actual
- Q(I);
- Vars
- S(b);CHECK,OGATE::R(F)+P(G),XS(b)
- R(d);OGATE,XP(E)::QAB1(I)
- R(d);OGATE,XS(H)::QAR2(I)
- R(d);XP(J)::S(D),XR(d)
- S(b);OGATE,XP(A)::R1(C)
- R(d);OGATE::QAR2(I)
- S(a);N_GUARD::S(D),XS(a)
- S(b);::R(F)+P(G)
- S(b);OGATE::R(F)+P(G),XS(b)
- P(f);OGATEB::QAB(I)
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).