MESON Chess Problem Database
Problem Display
PID: 250261 (8/2p1K1QB/7B/2P1R2P/P1Nk2p1/rpRN1b2/1Pn5/4rq2 w - - 0 1)
Heidrich, Gerhard
Berliner Arbeiter Schachklub, 1927
#2
12 + 9
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rea1
- 2.Rg5#
- 1...Rb1
- 2.Rg5#
- 1...Rc1
- 2.Rg5#
- 1...Rd1
- 2.Rg5#
- 1...Rxe5+
- 2.Qxe5#
- 1...Be4
- 2.Rf5#
- 1...Bd5
- 2.Re4#
- 1...Se3
- 2.Rg5#
- 1...Rea1
- Tries
- 1.Sd2?
- threat
- 2.Rc4#
- 1...Rxe5+
- 2.Qxe5#
- 1...Qxd3
- 2.Rxd3#
- 1...Rxa4
- 2.Sxb3#
- 1...Be4
- 2.Rf5#
- 1...Bd5
- 2.Re4#
- 1...Se3
- 2.Rf5#
- 2.Rg5#
- 1...Re4!
- threat
- 1.Sxa3?
- threat
- 2.Sb5#
- 2.Rc4#
- 1...Rxe5+
- 2.Qxe5#
- 1...Qxd3
- 2.Rxd3#
- 1...Re4
- 2.Sb5#
- 1...Be4
- 2.Sb5#
- 2.Rf5#
- 1...Bd5
- 2.Sb5#
- 2.Re4#
- 1...Bc6
- 2.Rc4#
- 1...Se3
- 2.Sb5#
- 2.Rg5#
- 1...c6
- 2.Rc4#
- 1...Sxa3!
- threat
- 1.Se3?
- threat
- 2.Sf5#
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 2.Re6#
- 1...Qxd3
- 2.Rxd3#
- 2.Re4#
- 2.Rd5#
- 2.Re6#
- 1...Rxa4
- 2.Sf5#
- 2.Re4#
- 2.Rd5#
- 2.Re6#
- 1...Sxe3
- 2.Rg5#
- 1...Bd1
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 1...Bh1
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 1...Be2
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 1...Bg2
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 1...Be4
- 2.Rxe4#
- 2.Rd5#
- 2.Rf5#
- 1...Bd5
- 2.Re4#
- 2.Rxd5#
- 1...Bc6
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 1...Bb7
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 1...Ba8
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 1...Rxe3!
- threat
- 1.Sb6?
- threat
- 2.Rc4#
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 1...Rxe5+
- 2.Qxe5#
- 1...Qxd3
- 2.Rxd3#
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 1...Rxa4
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 1...Qe2
- 2.Rc4#
- 2.Rxe2#
- 2.Re3#
- 2.Re4#
- 1...Rea1
- 2.Rc4#
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Rd5#
- 2.Re6#
- 1...Rb1
- 2.Rc4#
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Rd5#
- 2.Re6#
- 1...Rc1
- 2.Rc4#
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Rd5#
- 2.Re6#
- 1...Rd1
- 2.Rc4#
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Rd5#
- 2.Re6#
- 1...Re2
- 2.Rc4#
- 2.Rxe2#
- 2.Re3#
- 2.Re4#
- 1...Re3
- 2.Rc4#
- 2.Rxe3#
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Bd1
- 2.Rc4#
- 2.Re4#
- 1...Bh1
- 2.Rc4#
- 2.Re4#
- 1...Be2
- 2.Rc4#
- 2.Re4#
- 2.Rd5#
- 1...Bg2
- 2.Rc4#
- 2.Re4#
- 1...Be4
- 2.Rxe4#
- 2.Rd5#
- 2.Rf5#
- 1...Bd5
- 2.Re4#
- 1...Bc6
- 2.Rc4#
- 2.Re4#
- 1...Bb7
- 2.Rc4#
- 2.Re4#
- 1...Ba8
- 2.Rc4#
- 2.Re4#
- 1...Se3
- 2.Rxe3#
- 2.Re4#
- 2.Rd5#
- 2.Rg5#
- 2.Re6#
- 1...cxb6!
- threat
- 1.Sd6?
- threat
- 2.Sb5#
- 2.Sf5#
- 2.Rc4#
- 1...Rxe5+
- 2.Qxe5#
- 1...Qxd3
- 2.Rxd3#
- 1...Rxa4
- 2.Sb5#
- 2.Sf5#
- 1...Re4
- 2.Sb5#
- 2.Sf5#
- 1...Bd1
- 2.Sb5#
- 2.Rc4#
- 1...Bh1
- 2.Sb5#
- 2.Rc4#
- 1...Be2
- 2.Sb5#
- 2.Rc4#
- 2.Rf5#
- 1...Bg2
- 2.Sb5#
- 2.Rc4#
- 1...Be4
- 2.Sb5#
- 2.Rf5#
- 1...Bd5
- 2.Sb5#
- 2.Re4#
- 1...Bc6
- 2.Rc4#
- 1...Bb7
- 2.Sb5#
- 2.Rc4#
- 1...Ba8
- 2.Sb5#
- 2.Rc4#
- 1...Se3
- 2.Sb5#
- 2.Rf5#
- 2.Rg5#
- 1...c6
- 2.Sf5#
- 2.Rc4#
- 1...cxd6!
- threat
- 1.Be3+?
- 1...Sxe3
- 2.Rg5#
- 1...Rxe3!
- 1...Sxe3
- 1.Re6+?
- 1...Re5
- 2.Qxe5#
- 1...Kd5!
- 1...Re5
- 1.Sd2?
- Keys
- 1.Sa5!
- threat
- 2.Rc4#
- 1...Rxe5+
- 2.Qxe5#
- 1...Qxd3
- 2.Rxd3#
- 1...Rxa4
- 2.Sxb3#
- 1...Re4
- 2.Sc6#
- 1...Be4
- 2.Rf5#
- 1...Bd5
- 2.Re4#
- 1...Se3
- 2.Rg5#
- threat
- 1.Sa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- R(a);N_PINR(G)::QAB(K)+R(G)
- R(a);CHECK,OGATE,P_SPINR(a),XR(G)::QAB1(K),XR(a)
- B(f);N_PINR(G),SBLOCK::QAB(K)+R(G)
- B(f);SBLOCK::QAB(K)+R(G),DCHECK
- S(c);N_PINR(G)::QAB(K)+R(G)
- Tries
- Try
- S(E);
- Threat
- R1(B)
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XR(G)::QAB1(K),XR(a)
- Q(b);OGATE,XS(C)::R1(B),XQ(b)
- R(d);N_GUARD,XP(D)::S(E),XP(e)
- B(f);N_PINR(G)::QAB(K)+R(G)
- B(f);SBLOCK::QAB(K)+R(G),DCHECK
- Refutation
- R(a);
- Try
- S(E);XR(d)
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XR(G)::QAB1(K),XR(a)
- Q(b);OGATE,XS(C)::R1(B),XQ(b)
- R(a);::S(E)
- B(f);::R1(B)
- P(i);::R1(B)
- Refutation
- S(c);XS(E)
- Try
- S(E);N_SPINR(G)
- Threat
- DUALS(5)
- Vars
- S(c);SBLOCK,XS(E)::QAB(K)+R(G)
- Refutation
- R(a);P_PINR(G),XS(E)
- Try
- S(E);
- Threat
- DUALS(5)
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XR(G)::QAB1(K),XR(a)
- R(a);::QAB(K)+R(G),DCHECK,XR(a)
- B(f);::QAB(K)+R(G),DCHECK
- Refutation
- P(i);XS(E)
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XR(G)::QAB1(K),XR(a)
- Q(b);OGATE,XS(C)::R1(B),XQ(b)
- B(f);::R1(B)
- Refutation
- P(i);XS(E)
- Try
- B(I);CHECK,N_SPINR(G)
- Vars
- S(c);XB(I)::QAB(K)+R(G)
- Refutation
- R(a);P_PINR(G),XB(I)
- Try
- R(G);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAB1(K),XR(a)
- Refutation
- K(g);P-FLIGHT
- Try
- Actual
- S(E);
- Threat
- R1(B)
- Vars
- R(a);CHECK,OGATE,P_SPINR(a),XR(G)::QAB1(K),XR(a)
- Q(b);OGATE,XS(C)::R1(B),XQ(b)
- R(d);N_GUARD,XP(D)::S(E),XP(e)
- R(a);S_CUTB(f)::S(E)
- B(f);N_PINR(G),SBLOCK::QAB(K)+R(G)
- B(f);SBLOCK::QAB(K)+R(G),DCHECK
- S(c);N_PINR(G),SBLOCK::QAB(K)+R(G)
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).