MESON Chess Problem Database
Problem Display
PID: 212378 (4R3/2n3nb/p1r1q3/1pPP2Qp/1P1k4/K1RNp3/BB6/1r3N2 w - - 0 1)
Haring, Jacobus
The Problemist, 1986
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...Ke4
- 2.Qf4#
- 1...Qh3
- 2.Qe5#
- 1...Qg4
- 2.Qxe3#
- 2.Qe5#
- 1...Qxd5
- 2.Qxe3#
- 1...Qf5
- 2.Qxe3#
- 1...Qd7
- 2.Qxe3#
- 2.Qe5#
- 1...Qf7
- 2.Qxe3#
- 2.Qe5#
- 1...Qc8
- 2.Qxe3#
- 2.Qe5#
- 1...Qg8
- 2.Qxe3#
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...Qd6
- 2.Qxe3#
- 1...Qf6
- 2.Qxe3#
- 1...Qg6
- 2.Qxe3#
- 2.Qe5#
- 1...Qh6
- 2.Qe5#
- 1...Bxd3
- 2.Rc4#
- 1...Be4
- 2.Qxe3#
- 1...Ke4
- Tries
- 1.Sf4?
- threat
- 2.Rc4#
- 1...Ke4
- 2.Rxe3#
- 1...Rxb2!
- threat
- 1.Rxe6?
- threat
- 2.Qxe3#
- 2.Qf6#
- 2.Qe5#
- 2.Qxg7#
- 1...Rxf1
- 2.Qxe3#
- 2.Qe5#
- 1...Rxb2
- 2.Qf6#
- 2.Qe5#
- 2.Qxg7#
- 1...Sxd5
- 2.Qxd5#
- 2.Qe5#
- 1...Scxe6
- 2.Qxe3#
- 2.Qe5#
- 1...Sgxe6
- 2.Qxe3#
- 2.Qe5#
- 1...Re1
- 2.Qf6#
- 2.Qe5#
- 2.Qxg7#
- 1...Bf5
- 2.Qxe3#
- 2.Qf6#
- 2.Qxg7#
- 1...Bg6
- 2.Qxe3#
- 2.Qf6#
- 2.Qe5#
- 1...Sce8
- 2.Qxe3#
- 2.Qe5#
- 1...Sf5
- 2.Qf4#
- 2.Qf6#
- 1...Sge8
- 2.Qxe3#
- 2.Qe5#
- 1...e2
- 2.Qe3#
- 2.Qf6#
- 2.Qg1#
- 2.Qe5#
- 2.Qxg7#
- 1...Rxe6!
- threat
- 1.Qf4+?
- 1...Be4
- 2.Qxe3#
- 1...Qe4!
- 1...Be4
- 1.Qf6+?
- 1...Ke4
- 2.Sg3#
- 2.Qf4#
- 1...Qe5
- 2.Qxe5#
- 1...Qxf6!
- 1...Ke4
- 1.dxe6?
- threat
- 2.Qxe3#
- 2.Qe5#
- 1...Ke4
- 2.Qf4#
- 1...Rxf1
- 2.Qe5#
- 1...Rxb2
- 2.Qe5#
- 1...Rxc5
- 2.Qxe3#
- 1...Bxd3
- 2.Rc4#
- 2.Qxe3#
- 1...Re1
- 2.Qe5#
- 1...Bf5
- 2.Qxe3#
- 1...Sd5
- 2.Qxd5#
- 2.Qe5#
- 1...Sf5
- 2.Qf4#
- 1...e2
- 2.Qe3#
- 2.Qe5#
- 1...Rxe6!
- threat
- 1.Sf4?
- Keys
- 1.Se5!
- threat
- 2.Qxe3#
- 1...Ke4
- 2.Rxe3#
- 1...Qxe5
- 2.Qxe5#
- 1...Sxd5
- 2.Rc4#
- 1...Sf5
- 2.Qf4#
- 1...Qh3
- 2.Sxc6#
- 1...Qh6
- 2.Sf3#
- 1...Re1
- 2.Rxe3#
- 1...Be4
- 2.Rd3#
- 1...e2
- 2.Qe3#
- threat
- 1.Se5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- K(c);P-FLIGHT,P_SPINQ(h)::QAR1(J)
- Q(h);N_GUARD::QAB1(J)
- Q(h);N_GUARD,XP(I)::QAB1(J),XP(b)
- Q(h);N_GUARD::QAB1(J),XP(b)
- Q(h);N_GUARD::QAB1(J),XQ(h)
- B(k);SBLOCK,XS(F)::B(C)+R(E),DCHECK
- B(k);S_CUTQ(h)::QAB1(J),XP(b)
- Tries
- Try
- S(F);
- Threat
- B(C)+R(E),DCHECK
- Vars
- K(c);P-FLIGHT,P_SPINQ(h)::R1(E),XP(b)
- Refutation
- R(a);XB(C)
- Try
- R(K);XQ(h)
- Threat
- DUALS(4)
- Refutation
- R(g);XR(K)
- Try
- Q(J);CHECK
- Vars
- B(k);P_SPINB(k),S_CUTQ(h)::QAB1(J),XP(b)
- Refutation
- Q(h);P_SPINQ(h)
- Try
- Q(J);CHECK
- Vars
- Q(h);N_GUARD,P_SPINQ(h)::QAB1(J),XQ(h)
- Refutation
- Q(h);XQ(J)
- Try
- P(I);XQ(h)
- Threat
- DUALS(2)
- Vars
- K(c);P-FLIGHT::QAR1(J)
- R(a);XS(A)::QAB1(J)
- R(a);XB(C)::QAB1(J)
- R(g);XP(H)::QAB1(J),XP(b)
- R(a);::QAB1(J)
- B(k);::QAB1(J),XP(b)
- S(j);S_CUTB(k)::QAR2(J)
- Refutation
- R(g);XP(I)
- Try
- Actual
- S(F);
- Threat
- QAB1(J),XP(b)
- Vars
- K(c);P-FLIGHT::R1(E),XP(b)
- Q(h);OGATE,XS(F)::QAB1(J),XQ(h)
- S(i);SBLOCK,XP(I)::B(C)+R(E),DCHECK
- S(j);S_CUTB(k)::QAR2(J)
- Q(h);N_GUARD::S(F),XR(g)
- Q(h);::S(F)
- R(a);N_GUARD::B(C)+R(E),XP(b)
- B(k);SBLOCK::B(C)+R(E),DCHECK
- P(b);::QAB1(J)
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).