MESON Chess Problem Database
Problem Display
PID: 231187 (4n3/2b3p1/n1N5/7R/b3kp2/4N1P1/2P2PP1/1Q1K4 w - - 0 1)
Ellerman, Arnoldo
4th Prize, Sahovski Glasnik, 1927
#2
9 + 7
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Bxc2+
- 2.Qxc2#
- 1...Bb3
- 2.cxb3#
- 1...Bb5
- 2.c4#
- 1...Bxc6
- 2.c3#
- 1...Ba5
- 2.Re5#
- 1...Be5
- 2.Rxe5#
- 1...Bb6
- 2.Re5#
- 1...Bd8
- 2.Re5#
- 1...Sb4
- 2.Qxb4#
- 1...Sc5
- 2.Qb4#
- 1...Sb8
- 2.Qb4#
- 1...Sd6
- 2.Re5#
- 1...fxe3
- 2.f3#
- 1...Bxc2+
- Tries
- 1.Ke2?
- threat
- 2.f3#
- 1...Bb5+
- 2.c4#
- 1...f3+
- 2.gxf3#
- 1...Bxc6
- 2.c3#
- 1...fxg3!
- threat
- 1.Sd5?
- threat
- 2.Sc3#
- 2.f3#
- 1...Bxc2+
- 2.Qxc2#
- 1...Bxc6
- 2.c3#
- 1...fxg3
- 2.f3#
- 1...Be5
- 2.Rxe5#
- 1...Ba5
- 2.Re5#
- 2.f3#
- 1...f3
- 2.Sc3#
- 1...g5!
- threat
- 1.Rd5?
- threat
- 2.Rd4#
- 1...Bxc2+
- 2.Qxc2#
- 1...Bxc6
- 2.c3#
- 2.c4#
- 1...Be5
- 2.Rxe5#
- 1...Bb6
- 2.Re5#
- 1...fxe3!
- threat
- 1.Qa2?
- threat
- 2.Qc4#
- 2.Qd5#
- 1...Bxc2+
- 2.Qxc2#
- 1...Bxc6
- 2.Qc4#
- 1...fxg3
- 2.Qc4#
- 1...Bb5
- 2.Qd5#
- 1...Be5
- 2.Rxe5#
- 2.Qd5#
- 1...Bb6
- 2.Re5#
- 2.Qd5#
- 2.Qe6#
- 1...Sb4
- 2.Qc4#
- 1...Sd6
- 2.Re5#
- 2.Qd5#
- 2.Qe6#
- 1...Sf6
- 2.Qc4#
- 1...Bb3!
- threat
- 1.Qb2?
- threat
- 2.Qd4#
- 1...Bxc2+
- 2.Qxc2#
- 1...Be5
- 2.Rxe5#
- 2.Qxe5#
- 1...Bb6
- 2.Re5#
- 2.Qe5#
- 1...Bxc6!
- threat
- 1.Qb3?
- threat
- 2.Qc4#
- 2.Qd5#
- 2.Qd3#
- 2.f3#
- 1...Bxc6
- 2.Qc4#
- 2.Qd3#
- 1...fxg3
- 2.Qc4#
- 1...Bb5
- 2.Qd5#
- 2.f3#
- 1...Be5
- 2.Rxe5#
- 2.Qd5#
- 2.Qd3#
- 2.f3#
- 1...Bb6
- 2.Re5#
- 2.Qd5#
- 2.Qe6#
- 2.Qd3#
- 2.f3#
- 1...Sb4
- 2.Qc4#
- 2.Qxb4#
- 2.f3#
- 1...Sc5
- 2.Qc4#
- 2.Qd5#
- 2.Qb4#
- 2.f3#
- 1...Sd6
- 2.Re5#
- 2.Qd5#
- 2.Qe6#
- 2.Qd3#
- 2.f3#
- 1...Sf6
- 2.Qc4#
- 2.Qd3#
- 2.f3#
- 1...f3
- 2.Qc4#
- 2.Qd5#
- 2.Qd3#
- 1...Bxb3!
- threat
- 1.Qb6?
- threat
- 2.Qd4#
- 2.f3#
- 1...Bxc6
- 2.f3#
- 1...Bxb6
- 2.Re5#
- 1...fxg3
- 2.Qd4#
- 1...Be5
- 2.Rxe5#
- 2.f3#
- 1...Sc5
- 2.Qb4#
- 1...f3
- 2.Qd4#
- 1...Bxc2+!
- threat
- 1.Ke2?
- Keys
- 1.Rc5!
- threat
- 2.Rc4#
- 1...Bxc2+
- 2.Qxc2#
- 1...Bxc6
- 2.c3#
- 1...Sxc5
- 2.Qb4#
- 1...fxe3
- 2.f3#
- 1...Bb3
- 2.cxb3#
- 1...Bb5
- 2.c4#
- 1...Be5
- 2.Rxe5#
- 1...Bb6
- 2.Re5#
- 1...Sd6
- 2.Re5#
- threat
- 1.Rc5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- B(a);CHECK,OGATE,P_SPINB(a),XP(C)::QAB(A),XB(a)
- B(a);::QAB(A)+P(C),XB(a)
- B(a);N_PINP(C)::QAB(A)+P(C)
- B(a);N_PINP(C),XS(I)::QAB(A)+P(C)
- B(e);N_GUARD::R1(H)
- B(e);N_GUARD::R1(H),XB(e)
- S(d);N_GUARD::QAR(A),XS(d)
- S(d);N_GUARD::QAR(A)
- S(g);S_CUTB(e)::R1(H)
- P(c);SBLOCK,XS(F)::P(D)
- Tries
- Try
- K(B);N_SPINP(C),S_FLIGHT
- Threat
- P(D)
- Vars
- B(a);CHECK,N_GUARD::QAB(A)+P(C)
- P(c);CHECK,OGATE::P(E),XP(c)
- B(a);N_GUARD,XS(I)::QAB(A)+P(C)
- Refutation
- P(c);XP(G)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,OGATE,P_SPINB(a),XP(C)::QAB(A),XB(a)
- B(a);N_PINP(C),XS(I)::QAB(A)+P(C)
- P(c);XP(G)::P(D)
- B(e);N_GUARD::R1(H),XB(e)
- P(c);::S(F)
- Refutation
- P(f);
- Try
- R(H);
- Threat
- R1(H)
- Vars
- B(a);CHECK,OGATE,P_SPINB(a),XP(C)::QAB(A),XB(a)
- B(e);N_GUARD::R1(H),XB(e)
- B(e);N_GUARD::R1(H)
- Refutation
- P(c);XS(F)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,OGATE,XP(C)::QAB(A),XB(a)
- B(a);N_PINP(C),XS(I)::QAR2(A)
- P(c);XP(G)::QAR2(A)
- B(a);N_PINP(C)::QAB1(A)
- S(d);::QAR2(A)
- S(g);::QAR2(A)
- Refutation
- B(a);
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- B(a);CHECK,OGATE,XP(C)::QAB(A),XB(a)
- Refutation
- B(a);N_PINP(C),XS(I)
- Try
- Q(A);N_SPINP(C)
- Threat
- DUALS(4)
- Vars
- P(c);XP(G)::QAR2(A)
- Refutation
- B(a);P_PINP(C),XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(a);N_PINP(C),XS(I)::P(D)
- B(e);N_GUARD,XQ(A)::R1(H)
- P(c);XP(G)::QAR1(A)
- S(d);N_GUARD::QAR(A)
- P(c);::QAR1(A)
- Refutation
- B(a);CHECK,XP(C)
- Try
- Actual
- R(H);
- Threat
- R(H)
- Vars
- B(a);CHECK,OGATE,P_SPINB(a),XP(C)::QAB(A),XB(a)
- B(a);N_PINP(C),XS(I)::QAB(A)+P(C)
- S(d);N_GUARD,XR(H)::QAR(A)
- P(c);SBLOCK,XS(F)::P(D)
- B(a);::QAB(A)+P(C),XB(a)
- B(a);N_PINP(C)::QAB(A)+P(C)
- B(e);N_GUARD::R1(H),XB(e)
- B(e);N_GUARD::R1(H)
- S(g);S_CUTB(e)::R1(H)
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).