MESON Chess Problem Database
Problem Display
PID: 261672 (3N4/1q6/1p5b/4rp2/2PkP2R/1QnN4/p1PR1P2/K5Bb w - - 0 1)
Lipton, Michael
The Problemist, 1976
#2
11 + 9
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Sc6#
- 1...Qa6
- 2.Sc6#
- 1...Qc6
- 2.Sxc6#
- 1...Qa7
- 2.Sc6#
- 1...Qe7
- 2.Sc6#
- 1...Qf7
- 2.Sc6#
- 1...Qg7
- 2.Sc6#
- 1...Qh7
- 2.Sc6#
- 1...Qb8
- 2.Sc6#
- 1...Rxe4
- 2.Se6#
- 1...Ra5
- 2.Se6#
- 1...Rb5
- 2.Se6#
- 1...Rc5
- 2.Se6#
- 1...Rd5
- 2.Se6#
- 1...Re6
- 2.Sxe6#
- 1...Bxe4
- 2.f4#
- 1...Be3
- 2.fxe3#
- 1...Bg7
- 2.f3#
- 1...Bf8
- 2.f3#
- 1...Sxe4
- 2.c3#
- 1...f4
- 2.f3#
- 1...Qxe4
- Tries
- 1.Sc1+?
- 1...Kc5
- 2.f4#
- 1...Bxd2!
- 1...Kc5
- 1.Se1+?
- 1...Kc5
- 2.f4#
- 1...Bxd2!
- 1...Kc5
- 1.Sb2+?
- 1...Kc5
- 2.Qa3#
- 2.f4#
- 1...Bxd2!
- 1...Kc5
- 1.Sb4+?
- 1...Kc5
- 2.Sxb7#
- 2.f4#
- 1...Bxd2!
- 1...Kc5
- 1.Sf4+?
- 1...Kc5
- 2.f3#
- 1...Kxe4!
- 1...Kc5
- 1.Sc5+?
- 1...Kxc5
- 2.f4#
- 1...Bxd2!
- 1...Kxc5
- 1.Sxe5+?
- 1...Kc5
- 2.Se6#
- 2.Sxb7#
- 2.Qa3#
- 2.f4#
- 1...Kxe5
- 2.Qxc3#
- 1...Bxd2!
- 1...Kc5
- 1.Qxb6+?
- 1...Kxc4
- 2.Sb2#
- 2.Sxe5#
- 1...Rc5
- 2.Qxc5#
- 1...Qxb6!
- 1...Kxc4
- 1.exf5+?
- 1...Qe4
- 2.Sc6#
- 1...Re4
- 2.Se6#
- 1...Be4
- 2.f4#
- 1...Se4
- 2.c3#
- 1...Bf4!
- 1...Qe4
- 1.Sc1+?
- Keys
- 1.Qb4!
- threat
- 2.c5#
- 1...Qxe4
- 2.Sc6#
- 1...Rxe4
- 2.Se6#
- 1...Bxe4
- 2.f4#
- 1...Sxe4
- 2.c3#
- 1...fxe4
- 2.Sf4#
- 1...Qd5
- 2.cxd5#
- 1...Qa6
- 2.Sc6#
- 1...Qf7
- 2.Sc6#
- 1...Rb5
- 2.Se6#
- 2.cxb5#
- 1...Rc5
- 2.Se6#
- 1...Sd5
- 2.cxd5#
- threat
- 1.Qb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 14
- Sets
- Q(i);N_GUARD,P_SPINQ(i),XP(I)::S(K)
- Q(i);N_GUARD::S(K)
- Q(i);N_GUARD::S(K),XQ(i)
- R(e);N_GUARD,P_SPINR(e),XP(I)::S(K)
- R(e);N_GUARD::S(K)
- R(e);N_GUARD::S(K),XR(e)
- B(a);P_SPINB(a),SBLOCK,XP(I)::B(B)+P(E)
- B(h);OGATE::P(E),XB(h)
- B(h);N_GUARD::B(B)+P(E)
- S(c);OGATE,P_SPINS(c),XP(I)::P(C)
- P(f);S_CUTB(h)::B(B)+P(E)
- Tries
- Try
- S(G);CHECK
- Vars
- K(d);N_GUARD,S_FLIGHT::B(B)+P(E)
- Refutation
- B(h);XR(D)
- Try
- S(G);CHECK
- Vars
- K(d);N_GUARD,S_FLIGHT::B(B)+P(E)
- Refutation
- B(h);XR(D)
- Try
- S(G);CHECK
- Refutation
- B(h);XR(D)
- Try
- S(G);CHECK
- Refutation
- B(h);XR(D)
- Try
- S(G);CHECK
- Vars
- K(d);S_FLIGHT::B(B)+P(E)
- Refutation
- K(d);P-FLIGHT,XP(I)
- Try
- S(G);CHECK
- Vars
- K(d);S_FLIGHT,XS(G)::B(B)+P(E)
- Refutation
- B(h);XR(D)
- Try
- S(G);CHECK,XR(e)
- Vars
- K(d);N_GUARD,S_FLIGHT,XS(G)::QAB(F),XS(c)
- Refutation
- B(h);XR(D)
- Try
- Q(F);CHECK,XP(g)
- Vars
- R(e);N_GUARD,P_SPINR(e)::QAB1(F),XR(e)
- Refutation
- Q(i);XQ(F)
- Try
- P(I);CHECK,XP(f)
- Vars
- Q(i);P_SPINQ(i)::S(K)
- R(e);P_SPINR(e)::S(K)
- B(a);P_SPINB(a),SBLOCK,S_CUTR(e)::B(B)+P(E)
- S(c);OGATE,P_SPINS(c)::P(C)
- Refutation
- B(h);P_SPINB(h)
- Try
- Actual
- Q(F);
- Threat
- QAR(F)+P(H)
- Vars
- Q(i);N_GUARD,P_SPINQ(i),XP(I)::S(K)
- R(e);N_GUARD,P_SPINR(e),XP(I)::S(K)
- B(a);P_SPINB(a),SBLOCK,XP(I)::B(B)+P(E)
- S(c);OGATE,P_SPINS(c),XP(I)::P(C)
- P(f);P_SPINP(f),SBLOCK,XP(I)::R(D)+S(G)
- Q(i);OGATE::QAR(F)+P(H),XQ(i)
- Q(i);N_GUARD::S(K)
- R(e);N_GUARD::S(K)
- S(c);OGATE::QAR(F)+P(H),XS(c)
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).