MESON Chess Problem Database
Problem Display
PID: 256462 (3rBB2/1pPnPN2/R1b1k3/b1p5/1pP1N1pq/6P1/4KR2/4Q3 w - - 0 1)
Eerkes, Allard Pieter
Schackvarlden, 1938
#2
12 + 10
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxg3
- 2.Seg5#
- 2.exd8S#
- 1...Qg5
- 2.Sexg5#
- 1...Qh1
- 2.Seg5#
- 2.exd8S#
- 1...Qh2
- 2.Seg5#
- 2.exd8S#
- 1...Qh3
- 2.Seg5#
- 2.exd8S#
- 1...Qh5
- 2.exd8S#
- 1...Qh6
- 2.exd8S#
- 1...Qh7
- 2.Seg5#
- 2.exd8S#
- 1...Qh8
- 2.Seg5#
- 2.exd8S#
- 1...Se5
- 2.Sxc5#
- 2.Sxd8#
- 1...Sb6
- 2.Sxc5#
- 2.cxd8S#
- 1...Sf6
- 2.Sxc5#
- 2.exd8S#
- 1...Sb8
- 2.Sxc5#
- 1...b5
- 2.Rxc6#
- 1...b6
- 2.cxd8S#
- 1...Qxg3
- Tries
- 1.Sfg5+?
- 1...Ke5
- 2.Qa1#
- 1...Qxg5!
- 1...Ke5
- 1.Bxd7+?
- 1...Rxd7
- 2.Sxc5#
- 1...Kxd7!
- 1...Rxd7
- 1.Qd2?
- threat
- 2.Qd5#
- 2.Qd6#
- 1...Qxg3
- 2.Seg5#
- 2.Qd5#
- 2.exd8S#
- 1...Qxe7
- 2.Qd5#
- 1...Bxc7
- 2.Qd5#
- 1...bxa6
- 2.Qd6#
- 1...Qg5
- 2.Sexg5#
- 2.Qd6#
- 1...Qh5
- 2.Qd6#
- 2.exd8S#
- 1...Bb6
- 2.Qd6#
- 1...Se5
- 2.Sxc5#
- 2.Sxd8#
- 1...Sb6
- 2.Sxc5#
- 2.cxd8S#
- 1...Sf6
- 2.Sxc5#
- 2.exd8S#
- 1...Sb8
- 2.Sxc5#
- 1...b6
- 2.Qd6#
- 2.cxd8S#
- 1...Sxf8!
- threat
- 1.Qd1?
- threat
- 2.Qd5#
- 2.Qd6#
- 1...Qxg3
- 2.Seg5#
- 2.Qd5#
- 2.exd8S#
- 1...Qxe7
- 2.Qd5#
- 1...Bxc7
- 2.Qd5#
- 1...bxa6
- 2.Qd6#
- 1...Qg5
- 2.Sexg5#
- 2.Qd6#
- 1...Qh5
- 2.Qd6#
- 2.exd8S#
- 1...Bb6
- 2.Qd6#
- 1...Se5
- 2.Sxc5#
- 2.Sxd8#
- 1...Sb6
- 2.Sxc5#
- 2.cxd8S#
- 1...Sf6
- 2.Sxc5#
- 2.exd8S#
- 1...Sb8
- 2.Sxc5#
- 1...b6
- 2.Qd6#
- 2.cxd8S#
- 1...Sxf8!
- threat
- 1.gxh4?
- threat
- 2.Seg5#
- 2.exd8S#
- 1...Rxe8
- 2.Seg5#
- 1...Bxc7
- 2.Seg5#
- 1...Ra8
- 2.Seg5#
- 1...Rb8
- 2.Seg5#
- 1...Rc8
- 2.Seg5#
- 1...Sxf8!
- threat
- 1.Sfg5+?
- Keys
- 1.Kd1!
- threat
- 2.Sxc5#
- 2.Seg5#
- 1...Se5+
- 2.Sxd8#
- 1...Sb6+
- 2.cxd8S#
- 1...Sf6+
- 2.exd8S#
- 1...Sb8+
- 2.Sd2#
- 1...Sxf8+
- 2.Sd2#
- 1...Qg5
- 2.Sxc5#
- 2.Sexg5#
- threat
- 1.Kd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(c);N_GUARD::S(F),XQ(c)
- Q(c);N_GUARD::PXR(j)=S
- S(i);N_GUARD::S(F),XP(e)
- P(h);N_GUARD::R(G),XB(f)
- P(h);N_SPINB(f),S_CUTB(d)::PXR(j)=S
- Tries
- Try
- S(J);CHECK
- Vars
- K(g);N_SPINB(f),P-FLIGHT,S_CUTQ(c)::QAB(A)
- Refutation
- Q(c);XS(J)
- Try
- B(K);CHECK,XS(i)
- Vars
- R(j);XB(K)::S(F),XP(e)
- Refutation
- K(g);N_SPINB(f),S_FLIGHT,XB(K)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(c);XP(I)::QAB1(A)
- B(d);XP(H)::QAB1(A)
- P(h);N_SPINB(f),XR(G)::QAR1(A)
- B(d);N_SPINB(f)::QAR1(A)
- S(i);N_GUARD::S(F),XP(e)
- Refutation
- S(i);XB(L)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(c);XP(I)::QAB1(A)
- B(d);XP(H)::QAB1(A)
- P(h);N_SPINB(f),XR(G)::QAR1(A)
- B(d);N_SPINB(f)::QAR1(A)
- S(i);N_GUARD::S(F),XP(e)
- Refutation
- S(i);XB(L)
- Try
- P(D);XQ(c)
- Threat
- DUALS(2)
- Vars
- R(j);XB(K)::S(F)
- B(d);XP(H)::S(F)
- R(j);::S(F)
- Refutation
- S(i);XB(L)
- Try
- Actual
- K(B);S_FLIGHT
- Threat
- DUALS(2)
- Vars
- S(i);CHECK,SBLOCK::S(J),XR(j)
- S(i);CHECK,N_SPINB(f),S_CUTB(d)::PXR(j)=S
- S(i);CHECK,S_CUTQ(c)::PXR(j)=S
- S(i);CHECK,N_GUARD::QAR(A)+S(F)
- S(i);CHECK,N_GUARD,XB(L)::QAR(A)+S(F)
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).