MESON Chess Problem Database
Problem Display
PID: 237721 (3R3r/2pNp1B1/8/K2BRb1r/2pk1p1q/6Qp/4Pp2/bN6 w - - 0 1)
Ellerman, Arnoldo
Arbejder-Skak, 1947
#2
9 + 12
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qg5
- 2.Qxf2#
- 1...Qf6
- 2.Qxf2#
- 1...Qg4
- 2.Qxf2#
- 1...Bc3+
- 2.Qxc3#
- 1...Bg4
- 2.Qxf4#
- 1...Be6
- 2.Rg5#
- 1...Qg5
- Tries
- 1.Bb7?
- threat
- 2.Re4#
- 1...Bc3+
- 2.Qxc3#
- 1...Bxb1
- 2.Sf8#
- 1...Bxd7
- 2.Rxd7#
- 1...Qf6
- 2.Qxf2#
- 1...Bc2
- 2.Sf8#
- 1...Bd3
- 2.Sf8#
- 1...Be4
- 2.Rd5#
- 1...Bg4
- 2.Qxf4#
- 1...Be6
- 2.Rg5#
- 1...Bg6
- 2.Sf8#
- 1...Bh7
- 2.Sf8#
- 1...c6!
- threat
- 1.Ba8?
- threat
- 2.Re4#
- 1...Bc3+
- 2.Qxc3#
- 1...Bxb1
- 2.Sf8#
- 1...Bxd7
- 2.Rxd7#
- 1...Qf6
- 2.Qxf2#
- 1...Bc2
- 2.Sf8#
- 1...Bd3
- 2.Sf8#
- 1...Be4
- 2.Rd5#
- 1...Bg4
- 2.Qxf4#
- 1...Be6
- 2.Rg5#
- 1...Bg6
- 2.Sf8#
- 1...Bh7
- 2.Sf8#
- 1...c6!
- threat
- 1.Rxf5+?
- 1...Qf6
- 2.Qxf2#
- 2.Qxf4#
- 1...e5!
- 1...Qf6
- 1.e3+?
- 1...fxe3
- 2.Qxe3#
- 1...Kd3!
- 1...fxe3
- 1.Bb7?
- Keys
- 1.Bc6!
- threat
- 2.Re4#
- 1...Bc3+
- 2.Qxc3#
- 1...Bxb1
- 2.Sf8#
- 1...Bxd7
- 2.Rxd7#
- 1...Qf6
- 2.Qxf2#
- 1...Bc2
- 2.Sf8#
- 1...Bd3
- 2.Sf8#
- 1...Be4
- 2.Rd5#
- 1...Bg4
- 2.Qxf4#
- 1...Be6
- 2.Rg5#
- 1...Bg6
- 2.Sf8#
- 1...Bh7
- 2.Sf8#
- threat
- 1.Bc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 2
- Sets
- Q(g);N_GUARD::QAB(C),XP(b)
- B(a);CHECK,N_GUARD::QAB1(C),XB(a)
- B(h);N_GUARD,S_CUTQ(g)::QAR2(C),XP(f)
- B(h);OGATE::B(H)+R(F)
- Tries
- Try
- B(E);
- Threat
- B(H)+R(F),DCHECK
- Vars
- B(a);CHECK,N_GUARD::QAB1(C),XB(a)
- B(h);N_GUARD,P_PINR(F),XS(A)::R(I)+S(G)
- B(h);OGATE,P_PINR(F),P_SPINB(h),XS(G)::R(I),XB(h)
- Q(g);N_GUARD::QAB(C),XP(b)
- B(h);N_GUARD,P_PINR(F)::R(I)+S(G)
- B(h);P_PINR(F),SBLOCK::B(H)+R(F),DCHECK
- B(h);N_GUARD,P_PINR(F),S_CUTQ(g)::QAR2(C),XP(f)
- B(h);OGATE,P_PINR(F)::B(H)+R(F)
- Refutation
- P(j);
- Try
- B(E);
- Threat
- B(H)+R(F),DCHECK
- Vars
- B(a);CHECK,N_GUARD::QAB1(C),XB(a)
- B(h);N_GUARD,P_PINR(F),XS(A)::R(I)+S(G)
- B(h);OGATE,P_PINR(F),P_SPINB(h),XS(G)::R(I),XB(h)
- Q(g);N_GUARD::QAB(C),XP(b)
- B(h);N_GUARD,P_PINR(F)::R(I)+S(G)
- B(h);P_PINR(F),SBLOCK::B(H)+R(F),DCHECK
- B(h);N_GUARD,P_PINR(F),S_CUTQ(g)::QAR2(C),XP(f)
- B(h);OGATE,P_PINR(F)::B(H)+R(F)
- Refutation
- P(j);
- Try
- R(F);CHECK,XB(h)
- Refutation
- P(k);P_SPINP(k)
- Try
- P(B);CHECK
- Vars
- P(f);OGATE,XP(B)::QAB1(C),XP(f)
- Refutation
- K(e);P-FLIGHT
- Try
- Actual
- B(E);
- Threat
- B(H)+R(F),DCHECK
- Vars
- B(a);CHECK,N_GUARD::QAB1(C),XB(a)
- B(h);N_GUARD,P_PINR(F),XS(A)::R(I)+S(G)
- B(h);OGATE,P_PINR(F),P_SPINB(h),XS(G)::R(I),XB(h)
- Q(g);N_GUARD::QAB(C),XP(b)
- B(h);N_GUARD,P_PINR(F)::R(I)+S(G)
- B(h);P_PINR(F),SBLOCK::B(H)+R(F),DCHECK
- B(h);N_GUARD,P_PINR(F),S_CUTQ(g)::QAR2(C),XP(f)
- B(h);OGATE,P_PINR(F)::B(H)+R(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).