MESON Chess Problem Database
Problem Display
PID: 68335 (n2R1B1K/3B4/1p1N4/R1Pkp1N1/4p3/q1Pn4/1P6/1Q4b1 w - - 0 1)
Groeneveld, Cornelis
1st Prize, Probleemblad, 1990
#2
11 + 8
| 56 | The Problemist | 2006 |
| 3713 | Snap | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Qxc5
- 2.Qa2#
- 1...Qa2
- 2.Qxa2#
- 1...Bd4
- 2.c4#
- 1...Sc1
- 2.Qxe4#
- 1...Se1
- 2.Qxe4#
- 1...Sxb2
- 2.Qxe4#
- 1...Sb4
- 2.Qxe4#
- 1...Sf4
- 2.Qxe4#
- 1...Sxc5
- 2.Qxe4#
- 1...e3
- 2.Qxd3#
- 1...Qxc5
- Tries
- 1.Sc4?
- threat
- 2.Bb5#
- 1...Kxc4
- 2.Be6#
- 1...Bxc5
- 2.Se3#
- 1...Sxc5
- 2.Qxe4#
- 1...b5
- 2.Bxb5#
- 1...Qxc5!
- threat
- 1.Sdxe4?
- threat
- 2.Bb5#
- 1...Kc4
- 2.Be6#
- 1...Qxc5
- 2.Qa2#
- 1...Bxc5
- 2.Qxd3#
- 1...b5
- 2.Bxb5#
- 1...Sxc5!
- threat
- 1.Sb7?
- threat
- 2.Bb5#
- 1...Kc4
- 2.Be6#
- 1...Qxc5
- 2.Qa2#
- 1...Sxc5
- 2.Qxe4#
- 1...b5
- 2.Bxb5#
- 1...Bxc5!
- threat
- 1.Sdf7?
- threat
- 2.Bb5#
- 1...Kc4
- 2.Be6#
- 1...Qxc5
- 2.Qa2#
- 1...Sxc5
- 2.Qxe4#
- 1...b5
- 2.Bxb5#
- 1...Bxc5!
- threat
- 1.Sc8?
- threat
- 2.Bb5#
- 1...Kc4
- 2.Be6#
- 1...Qxc5
- 2.Qa2#
- 1...Sxc5
- 2.Qxe4#
- 1...b5
- 2.Bxb5#
- 1...Bxc5!
- threat
- 1.Se8?
- threat
- 2.Bb5#
- 1...Kc4
- 2.Be6#
- 1...Qxc5
- 2.Qa2#
- 1...Sxc5
- 2.Qxe4#
- 1...b5
- 2.Bxb5#
- 1...Bxc5!
- threat
- 1.Qa2+?
- 1...Qb3
- 2.Qxb3#
- 1...Qxa2!
- 1...Qb3
- 1.Qxd3+?
- 1...Bd4
- 2.Qc4#
- 2.Qxe4#
- 2.c4#
- 1...exd3!
- 1...Bd4
- 1.Sc4?
- Keys
- 1.Sf5!
- threat
- 2.Bb5#
- 1...Kc4
- 2.Be6#
- 1...Qxc5
- 2.Qa2#
- 1...Bxc5
- 2.Se3#
- 1...Sxc5
- 2.Qxe4#
- 1...b5
- 2.Bxb5#
- threat
- 1.Sf5!
This anticipates 7564(1991)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)
- Q(b);N_GUARD::QAB(A),XQ(b)
- B(a);SBLOCK::P(C)
- S(c);OGATE::QAB1(A),XP(d)
- S(c);OGATE,XP(B)::QAB1(A),XP(d)
- S(c);OGATE,P_SPINS(c),XP(E)::QAB1(A),XP(d)
- P(d);N_GUARD,S_CUTB(a)::QAR2(A),XS(c)
- Tries
- Try
- S(G);
- Threat
- R(I)+B(H)
- Vars
- K(e);S_FLIGHT,XS(G)::B(H)
- B(a);N_GUARD,P_SPINB(a),XP(E)::S(G)
- S(c);OGATE,P_SPINS(c),XP(E)::QAB1(A),XP(d)
- P(g);::R(I)+B(H),XP(g)
- Refutation
- Q(b);P_SPINQ(b),XP(E)
- Try
- S(G);XP(d)
- Threat
- R(I)+B(H)
- Vars
- K(e);S_FLIGHT::B(H)
- Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)
- B(a);N_GUARD,P_SPINB(a),XP(E)::QAR2(A),XS(c)
- P(g);::R(I)+B(H),XP(g)
- Refutation
- S(c);P_SPINS(c),XP(E)
- Try
- S(G);
- Threat
- R(I)+B(H)
- Vars
- K(e);S_FLIGHT::B(H)
- Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)
- S(c);OGATE,P_SPINS(c),XP(E)::QAB1(A),XP(d)
- P(g);::R(I)+B(H),XP(g)
- Refutation
- B(a);P_SPINB(a),XP(E)
- Try
- S(G);
- Threat
- R(I)+B(H)
- Vars
- K(e);S_FLIGHT::B(H)
- Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)
- S(c);OGATE,P_SPINS(c),XP(E)::QAB1(A),XP(d)
- P(g);::R(I)+B(H),XP(g)
- Refutation
- B(a);P_SPINB(a),XP(E)
- Try
- S(G);
- Threat
- R(I)+B(H)
- Vars
- K(e);S_FLIGHT::B(H)
- Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)
- S(c);OGATE,P_SPINS(c),XP(E)::QAB1(A),XP(d)
- P(g);::R(I)+B(H),XP(g)
- Refutation
- B(a);P_SPINB(a),XP(E)
- Try
- S(G);
- Threat
- R(I)+B(H)
- Vars
- K(e);S_FLIGHT::B(H)
- Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)
- S(c);OGATE,P_SPINS(c),XP(E)::QAB1(A),XP(d)
- P(g);::R(I)+B(H),XP(g)
- Refutation
- B(a);P_SPINB(a),XP(E)
- Try
- Q(A);CHECK
- Vars
- Q(b);N_GUARD,P_SPINQ(b)::QAB(A),XQ(b)
- Refutation
- Q(b);XQ(A)
- Try
- Q(A);CHECK,XS(c)
- Refutation
- P(d);XQ(A)
- Try
- Actual
- S(G);
- Threat
- R(I)+B(H)
- Vars
- K(e);S_FLIGHT::B(H)
- Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)
- B(a);N_GUARD,P_SPINB(a),XP(E)::S(G)
- S(c);OGATE,P_SPINS(c),XP(E)::QAB1(A),XP(d)
- P(g);::R(I)+B(H),XP(g)
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).