MESON Chess Problem Database
Problem Display
PID: 176580 (4b2N/3pK3/pp1Pp3/4k3/4Pb2/pN5B/4Q2B/2RR4 w - - 0 1)
Lider, Valentin Viktorovich
Schach-Echo, 1986
#2
10 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Bg3
- 2.Bxg3#
- 1...Bg6
- 2.Sxg6#
- 1...Bf7
- 2.Sxf7#
- 1...b5
- 2.Rc5#
- 1...Bg3
- Tries
- 1.Sa5?
- threat
- 2.Sc4#
- 1...bxa5
- 2.Rc5#
- 1...Bg3
- 2.Bxg3#
- 1...b5
- 2.Rc5#
- 1...Bxh2!
- threat
- 1.Bg2?
- 1...Bg3
- 2.Bxg3#
- 1...Bh5
- 2.Qxh5#
- 1...Bg6
- 2.Sxg6#
- 1...Bf7
- 2.Sxf7#
- 1...a2
- 2.Qb2#
- 1...a5
- 2.Qb5#
- 1...b5
- 2.Rc5#
- 1...Bxh2!
- 1...Bg3
- 1.Bf5?
- 1...Bxh2
- 2.Qxh2#
- 1...exf5
- 2.Rd5#
- 1...Bg3
- 2.Bxg3#
- 1...Bg6
- 2.Sxg6#
- 1...Bf7
- 2.Sxf7#
- 1...a2
- 2.Qb2#
- 1...a5
- 2.Qb5#
- 1...b5
- 2.Rc5#
- 1...Bh5!
- 1...Bxh2
- 1.Rc4?
- 1...Bxh2
- 2.Qxh2#
- 1...Bg3
- 2.Bxg3#
- 1...Bh5
- 2.Qxh5#
- 1...Bg6
- 2.Sxg6#
- 1...Bf7
- 2.Sxf7#
- 1...a2
- 2.Qb2#
- 1...b5
- 2.Rc5#
- 1...a5!
- 1...Bxh2
- 1.Rf1?
- threat
- 2.Bxf4#
- 1...Bg3
- 2.Bxg3#
- 1...Bxh2!
- threat
- 1.Rg1?
- threat
- 2.Rg5#
- 1...Bg3
- 2.Bxg3#
- 1...Bg6
- 2.Sxg6#
- 1...Bxh2!
- threat
- 1.Rd4?
- 1...Bxh2
- 2.Qxh2#
- 1...Bg3
- 2.Bxg3#
- 1...Bh5
- 2.Qxh5#
- 1...Bg6
- 2.Sxg6#
- 1...Bf7
- 2.Sxf7#
- 1...a5
- 2.Qb5#
- 1...b5
- 2.Rc5#
- 1...a2!
- 1...Bxh2
- 1.Qd3?
- threat
- 2.Qd4#
- 1...Bg3
- 2.Bxg3#
- 1...Bxh2!
- threat
- 1.Qf3?
- threat
- 2.Bxf4#
- 2.Qxf4#
- 1...Bg3
- 2.Bxg3#
- 1...Bxh2!
- threat
- 1.Qc4?
- threat
- 2.Qd4#
- 1...Bg3
- 2.Bxg3#
- 1...Bxh2!
- threat
- 1.Qg4?
- threat
- 2.Qxf4#
- 1...Kxe4
- 2.Qxf4#
- 1...Bg3
- 2.Bxg3#
- 1...Bxh2!
- threat
- 1.Qe3?
- threat
- 2.Bxf4#
- 2.Qd4#
- 2.Qxf4#
- 1...Bg3
- 2.Bxg3#
- 1...Bxh2!
- threat
- 1.Sa5?
- Keys
- 1.Re1!
- 1...Bxh2
- 2.Qxh2#
- 1...Bg3
- 2.Bxg3#
- 1...Bh5
- 2.Qxh5#
- 1...Bg6
- 2.Sxg6#
- 1...Bf7
- 2.Sxf7#
- 1...a2
- 2.Qb2#
- 1...a5
- 2.Qb5#
- 1...b5
- 2.Rc5#
- 1...Bxh2
- 1.Re1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- B(b);OGATEB::B(D),XB(b)
- B(h);N_GUARD::S(J),XB(h)
- P(e);N_GUARD::R(A)
- Tries
- Try
- S(E);
- Threat
- S(E)
- Vars
- P(e);N_GUARD,XS(E)::R(A)
- B(b);OGATEB::B(D),XB(b)
- P(e);N_GUARD::R(A)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- B(F);
- Vars
- B(b);OGATEB::B(D),XB(b)
- B(h);N_GUARD::QAR(C),XB(h)
- B(h);N_GUARD::S(J),XB(h)
- P(a);N_GUARD::QAB(C)
- P(d);N_GUARD::QAR(C)
- P(e);N_GUARD::R(A)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- B(F);
- Vars
- B(b);N_SPINB(b),OGATE,XB(D)::QAB(C),XB(b)
- P(f);N_GUARD,XB(F)::R1(B)
- B(b);OGATEB::B(D),XB(b)
- B(h);N_GUARD::S(J),XB(h)
- P(a);N_GUARD::QAB(C)
- P(d);N_GUARD::QAR(C)
- P(e);N_GUARD::R(A)
- Refutation
- B(h);
- Try
- R(A);
- Vars
- B(b);N_SPINB(b),OGATE,XB(D)::QAB(C),XB(b)
- B(b);OGATEB::B(D),XB(b)
- B(h);N_GUARD::QAR(C),XB(h)
- B(h);N_GUARD::S(J),XB(h)
- P(a);N_GUARD::QAB(C)
- P(e);N_GUARD::R(A)
- Refutation
- P(d);
- Try
- R(B);
- Threat
- B(D),XB(b)
- Vars
- B(b);OGATEB::B(D),XB(b)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- R(B);
- Threat
- R(B)
- Vars
- B(b);OGATEB::B(D),XB(b)
- B(h);N_GUARD::S(J),XB(h)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- R(B);
- Vars
- B(b);N_SPINB(b),OGATE,XB(D)::QAB(C),XB(b)
- B(b);OGATEB::B(D),XB(b)
- B(h);N_GUARD::QAR(C),XB(h)
- B(h);N_GUARD::S(J),XB(h)
- P(d);N_GUARD::QAR(C)
- P(e);N_GUARD::R(A)
- Refutation
- P(a);
- Try
- Q(C);
- Threat
- QAB1(C)
- Vars
- B(b);OGATEB::B(D),XB(b)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- B(b);OGATEB::B(D),XB(b)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- Q(C);
- Threat
- QAB1(C)
- Vars
- B(b);OGATEB::B(D),XB(b)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- Q(C);
- Threat
- QAB1(C),XB(b)
- Vars
- K(c);P-FLIGHT,XP(G)::QAR1(C),XB(b)
- B(b);OGATEB::B(D),XB(b)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- B(b);OGATEB::B(D),XB(b)
- Refutation
- B(b);N_SPINB(b),XB(D)
- Try
- Actual
- R(B);
- Vars
- B(b);N_SPINB(b),OGATE,XB(D)::QAB(C),XB(b)
- B(b);OGATEB::B(D),XB(b)
- B(h);N_GUARD::QAR(C),XB(h)
- B(h);N_GUARD::S(J),XB(h)
- P(a);N_GUARD::QAB(C)
- P(d);N_GUARD::QAR(C)
- P(e);N_GUARD::R(A)
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).