MESON Chess Problem Database
Problem Display
PID: 244448 (1N2R3/rp1B1Pbb/8/Np1k1q1R/pB1p4/8/1nQ2n2/1K6 w - - 0 1)
Eerkes, Allard Pieter
Norsk Sjakkblad, 1937
#2
9 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qe5
- 2.Be6#
- 1...Bg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sbd3
- 2.Qa2#
- 1...Sd1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Sfd3
- 2.Qg2#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sg4
- 2.Qe4#
- 1...d3
- 2.Qc5#
- 1...b6
- 2.Bc6#
- 1...Qe5
- Tries
- 1.Sac6?
- threat
- 2.Be6#
- 1...bxc6
- 2.Bxc6#
- 1...Be5
- 2.Se7#
- 1...Sbd3
- 2.Qa2#
- 1...d3
- 2.Qc5#
- 1...Sfd3!
- threat
- 1.Sxb7?
- threat
- 2.Bc6#
- 1...d3
- 2.Qc5#
- 1...Ra6!
- threat
- 1.Bxf5?
- threat
- 2.Be4#
- 2.Be6#
- 2.Qc5#
- 1...d3
- 2.Qc5#
- 1...Be5
- 2.Be6#
- 2.Qc5#
- 1...Bf8
- 2.Be4#
- 2.Be6#
- 2.Bg6#
- 2.Bxh7#
- 1...Sbd3
- 2.Be4#
- 2.Qa2#
- 1...Sc4
- 2.Be4#
- 2.Be6#
- 1...Sfd3
- 2.Be4#
- 2.Qg2#
- 1...Se4
- 2.Bxe4#
- 2.Be6#
- 2.Qxe4#
- 1...b6
- 2.Be4#
- 2.Be6#
- 2.Qc6#
- 1...Bxf5!
- threat
- 1.Rxf5+?
- 1...Be5
- 2.Be6#
- 2.Rfxe5#
- 2.Rexe5#
- 1...Bxf5!
- 1...Be5
- 1.Qxf5+?
- 1...Be5
- 2.Be6#
- 2.Rxe5#
- 1...Bxf5+!
- 1...Be5
- 1.f8Q?
- threat
- 2.Qc5#
- 2.Qd6#
- 2.Qf7#
- 1...Qxh5
- 2.Qc5#
- 2.Qd6#
- 1...d3
- 2.Qfc5#
- 2.Qd6#
- 2.Qcc5#
- 1...Be5
- 2.Qc5#
- 1...Ra6
- 2.Qc5#
- 1...Bg6
- 2.Qc5#
- 2.Qd6#
- 1...Bg8
- 2.Qc5#
- 2.Qd6#
- 2.Qxg8#
- 1...Sbd3
- 2.Qd6#
- 2.Qa2#
- 2.Qf7#
- 1...Sc4
- 2.Qc5#
- 2.Qf7#
- 1...Sfd3
- 2.Qd6#
- 2.Qg2#
- 2.Qf7#
- 1...Se4
- 2.Qxe4#
- 2.Qf7#
- 1...b6
- 2.Bc6#
- 2.Qd6#
- 2.Qf7#
- 1...Bxf8!
- threat
- 1.Sac6?
- Keys
- 1.Sbc6!
- threat
- 2.Be6#
- 1...bxc6
- 2.Bxc6#
- 1...Be5
- 2.Se7#
- 1...Sbd3
- 2.Qa2#
- 1...Sfd3
- 2.Qg2#
- 1...d3
- 2.Qc5#
- threat
- 1.Sbc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(g);::B(F)
- B(k);OGATE::PXB(k)=Q
- S(a);N_PINQ(B)::QAB(B)
- S(b);N_GUARD::QAB1(B)
- S(b);N_PINQ(B)::QAB(B)
- S(b);N_GUARD,N_PINQ(B)::QAB1(B),XS(b)
- P(d);N_PINQ(B)::QAR1(B)
- P(i);N_GUARD::B(F)
- Tries
- Try
- S(D);
- Threat
- B(F)
- Vars
- P(i);OGATE,XS(D)::B(F),XP(i)
- B(j);N_SPINQ(g),SBLOCK::S(D)
- S(a);N_PINQ(B)::QAB(B)
- P(d);N_PINQ(B)::QAR1(B)
- Refutation
- S(b);N_PINQ(B)
- Try
- S(D);XP(i)
- Threat
- B(F)
- Vars
- P(d);N_PINQ(B)::QAR1(B)
- Refutation
- R(h);
- Try
- B(F);N_SPINQ(B),XQ(g)
- Threat
- DUALS(3)
- Vars
- P(d);::QAR1(B)
- Refutation
- B(k);P_PINQ(B),P_SPINB(k),XB(F)
- Try
- R(E);CHECK,N_SPINQ(B),XQ(g)
- Refutation
- B(k);P_PINQ(B),XR(E)
- Try
- Q(B);CHECK,XQ(g)
- Refutation
- B(k);CHECK,P_SPINB(k),XQ(B)
- Try
- P(G);
- Threat
- DUALS(3)
- Vars
- B(j);N_SPINQ(g)::QAR1(G)
- R(h);::QAR1(G)
- Refutation
- B(j);XQ(G)
- Try
- Actual
- S(H);
- Threat
- B(F)
- Vars
- P(i);OGATE,XS(H)::B(F),XP(i)
- B(j);N_SPINQ(g),SBLOCK::S(H)
- S(a);N_PINQ(B)::QAB(B)
- S(b);N_PINQ(B)::QAB(B)
- P(d);N_PINQ(B)::QAR1(B)
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).