MESON Chess Problem Database
Problem Display
PID: 63008 (8/3p1p2/R1n5/2rPkN1K/1Qn3RB/N7/1P1P1P2/7B w - - 0 1)
de Jong, Leonard Nicholaas
Source?, 0000
#2
12 + 6
| 58 | Tijdschrift vd NSB | 1896 |
SOLUTION
- SOUND
- Sets
- 1...Sxb2
- 2.Qe4#
- 2.Qf4#
- 1...Sxd2
- 2.Qf4#
- 1...Sxa3
- 2.Qe4#
- 2.Qf4#
- 1...Se3
- 2.Qe4#
- 2.Qf4#
- 1...S4a5
- 2.Qe4#
- 2.Qf4#
- 1...Sb6
- 2.Qe4#
- 2.Qf4#
- 1...Sd6
- 2.Qf4#
- 1...Sxb2
- Tries
- 1.Kg5?
- threat
- 2.Bg3#
- 2.f4#
- 1...Rxd5
- 2.Re4#
- 1...f6+!
- threat
- 1.Sxc4+?
- 1...Kxf5
- 2.Be4#
- 1...Rxc4!
- 1...Kxf5
- 1.Se3?
- 1...Kd6
- 2.Qb8#
- 1...Rxd5
- 2.Re4#
- 1...Sxb2
- 2.Qf4#
- 1...Sxd2
- 2.Qf4#
- 1...Sxa3
- 2.Qf4#
- 1...Sxe3
- 2.Qf4#
- 1...Sxb4
- 2.Bg3#
- 2.Bf6#
- 2.Re4#
- 2.d4#
- 1...Ra5
- 2.Saxc4#
- 2.Re4#
- 1...Rb5
- 2.Saxc4#
- 2.Re4#
- 1...S4a5
- 2.Qf4#
- 1...Sb6
- 2.Qf4#
- 1...Sd6
- 2.Qf4#
- 2.f4#
- 1...Sd4
- 2.Bg3#
- 2.Bf6#
- 2.Re4#
- 2.f4#
- 1...S6a5
- 2.Bg3#
- 2.Bf6#
- 2.Re4#
- 2.Qc3#
- 2.d4#
- 1...Sa7
- 2.Bg3#
- 2.Bf6#
- 2.Re4#
- 2.Qc3#
- 2.d4#
- 1...Se7
- 2.Bg3#
- 2.Bf6#
- 2.Re4#
- 2.Qc3#
- 2.d4#
- 1...Sb8
- 2.Bg3#
- 2.Bf6#
- 2.Re4#
- 2.Qc3#
- 2.d4#
- 1...Sd8
- 2.Bg3#
- 2.Bf6#
- 2.Re4#
- 2.Qc3#
- 2.d4#
- 1...d6
- 2.Re4#
- 1...f6
- 2.Bg3#
- 1...f5!
- 1...Kd6
- 1.Sh6?
- 1...Kd6
- 2.Qb8#
- 1...Rxd5
- 2.Re4#
- 1...Sxb2
- 2.Qf4#
- 1...Sxd2
- 2.Qf4#
- 1...Sxa3
- 2.Qf4#
- 1...Sxb4
- 2.Bg3#
- 2.Bf6#
- 2.d4#
- 1...f5
- 2.Sf7#
- 1...Ra5
- 2.Sxc4#
- 1...Rb5
- 2.Sxc4#
- 1...Se3
- 2.Qf4#
- 1...S4a5
- 2.Qf4#
- 1...Sb6
- 2.Qf4#
- 1...Sd6
- 2.Qf4#
- 2.f4#
- 1...Sd4
- 2.Bg3#
- 2.Bf6#
- 2.f4#
- 1...S6a5
- 2.Bg3#
- 2.Bf6#
- 2.Qc3#
- 2.d4#
- 1...Sa7
- 2.Bg3#
- 2.Bf6#
- 2.Qc3#
- 2.d4#
- 1...Se7
- 2.Bg3#
- 2.Bf6#
- 2.Qc3#
- 2.d4#
- 1...Sb8
- 2.Bg3#
- 2.Bf6#
- 2.Qc3#
- 2.d4#
- 1...Sd8
- 2.Bg3#
- 2.Bf6#
- 2.Qc3#
- 2.d4#
- 1...f6
- 2.Bg3#
- 1...d6!
- 1...Kd6
- 1.Re4+?
- 1...Kxd5
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re7#
- 2.Re8#
- 1...Kxf5!
- 1...Kxd5
- 1.Qc3+?
- 1...Kxf5
- 2.Be4#
- 2.Qf6#
- 1...Sd4!
- 1...Kxf5
- 1.d4+?
- 1...Kxf5
- 2.Be4#
- 1...Sxd4!
- 1...Kxf5
- 1.Kg5?
- Keys
- 1.Sd6!
- 1...Kxd6
- 2.Qb8#
- 1...Rxd5
- 2.Re4#
- 1...Sxb2
- 2.Qf4#
- 1...Sxd2
- 2.Qf4#
- 1...Sxa3
- 2.Qf4#
- 1...Sxd6
- 2.Qf4#
- 1...Sxb4
- 2.d4#
- 1...f5
- 2.Sf7#
- 1...Ra5
- 2.Saxc4#
- 1...Rb5
- 2.Saxc4#
- 1...Se3
- 2.Qf4#
- 1...S4a5
- 2.Qf4#
- 1...Sb6
- 2.Qf4#
- 1...Sd4
- 2.f4#
- 1...S6a5
- 2.Qc3#
- 2.d4#
- 1...Sa7
- 2.Qc3#
- 2.d4#
- 1...Se7
- 2.Qc3#
- 2.d4#
- 1...Sb8
- 2.Qc3#
- 2.d4#
- 1...Sd8
- 2.Qc3#
- 2.d4#
- 1...f6
- 2.Bg3#
- 1...Kxd6
- 1.Sd6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 13
- REMOVED MATES = 0
- Sets
- S(a);OGATE,XP(C)::QAB1(F)
- S(a);OGATE::QAB1(F)
- Tries
- Try
- K(K);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- R(b);SBLOCK,XP(I)::R1(G)
- Refutation
- P(f);CHECK
- Try
- S(E);CHECK,XS(a)
- Vars
- K(c);P-FLIGHT,XS(J)::B(A)
- Refutation
- R(b);XS(E)
- Try
- S(J);
- Vars
- K(c);P_PINP(I),P_SPINR(b),P_SPINS(d),S_FLIGHT::QAB(F)
- R(b);XP(I)::R1(G)
- S(a);OGATE,XP(B)::QAB1(F)
- S(a);OGATE,XP(C)::QAB1(F)
- S(a);OGATE,XS(E)::QAB1(F)
- S(a);OGATE,XS(J)::QAB1(F)
- S(a);OGATE::QAB1(F)
- P(e);SBLOCK::R1(G)
- P(f);SBLOCK::B(H)
- Refutation
- P(f);
- Try
- S(J);
- Vars
- K(c);P_PINP(I),P_SPINR(b),P_SPINS(d),S_FLIGHT::QAB(F)
- R(b);SBLOCK,XP(I)::R1(G)
- S(a);OGATE,XP(B)::QAB1(F)
- S(a);OGATE,XP(C)::QAB1(F)
- S(a);OGATE,XS(E)::QAB1(F)
- P(f);SBLOCK::S(J)
- R(b);N_GUARD::S(E),XS(a)
- S(a);OGATE::QAB1(F)
- P(f);SBLOCK::B(H)
- Refutation
- P(e);
- Try
- R(G);CHECK
- Refutation
- K(c);P-FLIGHT,XS(J)
- Try
- Q(F);CHECK
- Refutation
- S(d);P_SPINS(d)
- Try
- P(C);CHECK
- Vars
- K(c);P-FLIGHT,XS(J)::B(A)
- Refutation
- S(d);XP(C)
- Try
- Actual
- S(J);
- Vars
- K(c);OGATEB,P_PINP(I),P_SPINR(b),P_SPINS(d),S_FLIGHT,XS(J)::QAB(F)
- R(b);SBLOCK,XP(I)::R1(G)
- S(a);OGATE,XP(B)::QAB1(F)
- S(a);OGATE,XP(C)::QAB1(F)
- S(a);OGATE,XS(E)::QAB1(F)
- S(a);OGATE,SBLOCK,XS(J)::QAB1(F)
- S(d);N_GUARD,XQ(F)::P(C)
- P(f);SBLOCK::S(J)
- R(b);N_GUARD::S(E),XS(a)
- S(a);OGATE::QAB1(F)
- S(d);SBLOCK::P(D)
- P(f);SBLOCK::B(H)
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).