MESON Chess Problem Database
Problem Display
PID: 30968 (Q1N4B/5Bn1/1P1P1nb1/b1NPk2p/5R2/3PP3/8/1K6 w - - 0 1)
Nietvelt, Gustaaf Josephus
Ajedrez Argentino, 1926
#2
12 + 6
| 20 | De Problemist | 1927 |
SOLUTION
- SOUND
- Sets
- 1...Bxb6
- 2.Qa1#
- 1...Bxd3+
- 2.Sxd3#
- 1...Bxf7
- 2.d4#
- 1...Se4
- 2.Sd7#
- 2.d4#
- 1...Sg4
- 2.Sd7#
- 1...Sxd5
- 2.Sd7#
- 2.Qxd5#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...Sfe8
- 2.Sd7#
- 1...Sg8
- 2.Sd7#
- 1...Sf5
- 2.Sd7#
- 2.Re4#
- 1...Se6
- 2.Sd7#
- 2.Bxf6#
- 1...Sge8
- 2.Sd7#
- 1...Bxb6
- Tries
- 1.Ka1?
- threat
- 2.d4#
- 1...Bxd3
- 2.Sxd3#
- 1...Sf5
- 2.Sd7#
- 2.Re4#
- 1...Se6
- 2.Sd7#
- 2.Bxf6#
- 1...Bc3+!
- threat
- 1.Ka2?
- threat
- 2.d4#
- 1...Bxd3
- 2.Sxd3#
- 1...Sf5
- 2.Sd7#
- 2.Re4#
- 1...Se6
- 2.Sd7#
- 2.Bxf6#
- 1...Bc3!
- threat
- 1.Kb2?
- threat
- 2.d4#
- 1...Bxd3
- 2.Sxd3#
- 1...Sf5
- 2.Sd7#
- 2.Re4#
- 1...Se6
- 2.Sd7#
- 2.Bxf6#
- 1...Bc3+!
- threat
- 1.Bxg6?
- threat
- 2.d4#
- 1...Sf5
- 2.Sd7#
- 2.Re4#
- 2.Rxf5#
- 1...Se6
- 2.Sd7#
- 2.Bxf6#
- 2.Re4#
- 2.Rf5#
- 1...Bc3!
- threat
- 1.Bxg7?
- threat
- 2.Sd7#
- 2.Bxf6#
- 1...Bxd3+
- 2.Sxd3#
- 1...Bf5!
- threat
- 1.Qxa5?
- threat
- 2.Qc3#
- 2.Qa1#
- 1...Bxd3+
- 2.Sxd3#
- 1...Sxd5
- 2.Sd7#
- 1...Se6
- 2.Sd7#
- 1...Se4
- 2.Sd7#
- 2.d4#
- 1...Sf5
- 2.Sd7#
- 2.Re4#
- 1...Bxf7!
- threat
- 1.Ka1?
- Keys
- 1.d7!
- threat
- 2.Qb8#
- 1...Bxd3+
- 2.Sxd3#
- 1...Bxb6
- 2.Qa1#
- 1...Bxf7
- 2.d4#
- 1...Sxd5
- 2.Qxd5#
- 1...Sxd7
- 2.Sxd7#
- 1...Se4
- 2.d4#
- 1...Sfe8
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sf5
- 2.Re4#
- 1...Se6
- 2.Bxf6#
- 1...Sge8
- 2.dxe8Q#
- 2.dxe8R#
- threat
- 1.d7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- B(a);OGATE,XP(G)::QAB(J)
- B(e);CHECK,XP(B)::S(E),XB(e)
- B(e);N_PINP(B),XB(I)::P(B)
- S(d);N_GUARD,P_SPINS(f)::S(E)
- S(d);N_GUARD,P_SPINS(f)::S(E),XS(d)
- S(f);P_SPINS(d)::S(E)
- Tries
- Try
- K(A);N_SPINP(B),P-FLIGHT
- Threat
- P(B)
- Vars
- B(e);XP(B)::S(E),XB(e)
- Refutation
- B(a);CHECK
- Try
- K(A);N_SPINP(B),S_FLIGHT
- Threat
- P(B)
- Vars
- B(e);XP(B)::S(E),XB(e)
- Refutation
- B(a);
- Try
- K(A);N_SPINP(B),P-FLIGHT
- Threat
- P(B)
- Vars
- B(e);XP(B)::S(E),XB(e)
- Refutation
- B(a);CHECK
- Try
- B(I);N_SPINP(B),XB(e)
- Threat
- P(B)
- Refutation
- B(a);
- Try
- B(L);P_PINS(d),XS(f)
- Threat
- DUALS(2)
- Vars
- B(e);CHECK,XP(B)::S(E),XB(e)
- Refutation
- B(e);
- Try
- Q(J);XB(a)
- Threat
- DUALS(2)
- Vars
- B(e);CHECK,XP(B)::S(E),XB(e)
- S(d);N_GUARD,P_SPINS(f),XP(F)::S(E)
- S(f);P_SPINS(d)::S(E)
- Refutation
- B(e);N_PINP(B),XB(I)
- Try
- Actual
- P(H);
- Threat
- QAB(J)
- Vars
- B(e);CHECK,XP(B)::S(E),XB(e)
- B(a);OGATE,XP(G)::QAB(J)
- B(e);N_PINP(B),XB(I)::P(B)
- S(d);OGATE,P_SPINS(f),XP(F)::QAR1(J),XS(d)
- S(d);P_SPINS(f),XP(H)::S(E),XS(d)
- S(d);N_PINP(B),P_SPINS(f)::P(B)
- S(d);OGATE,P_SPINS(f)::PXS(d)=Q
- S(f);N_PINP(B),P_SPINS(d),SBLOCK,S_CUTB(e)::R1(D)
- S(f);OGATE,P_SPINS(d)::B(L),XS(d)
- S(f);OGATE,P_SPINS(d)::PXS(f)=Q
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).