MESON Chess Problem Database
Problem Display
PID: 232703 (4R3/5bb1/4NRr1/2p3p1/2KBk1P1/p1QN2p1/3p4/1B3q1r w - - 0 1)
Frohlich, Georg
Freie Presse, 1974
#2
9 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qg2
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...Qxd3+
- 2.Bxd3#
- 2.Qxd3#
- 1...Qh3
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...Qxb1
- 2.Sxc5#
- 1...Qc1
- 2.Sxc1#
- 2.Sf2#
- 2.Sxc5#
- 1...Qd1
- 2.Sf2#
- 2.Sxc5#
- 1...Qe1
- 2.Sc1#
- 2.Sxe1#
- 2.Sf2#
- 2.Sxc5#
- 1...Qg1
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...Qf2
- 2.Sc1#
- 2.Se1#
- 2.Sxf2#
- 2.Sxc5#
- 1...Qf3
- 2.Sf2#
- 2.Sxc5#
- 1...Qf4
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...Qf5
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...Qxf6
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...Bxe6+
- 2.Rexe6#
- 1...Bxe8
- 2.Sxc5#
- 1...cxd4
- 2.Qxd4#
- 1...Qg2
- Tries
- 1.Rf4+?
- 1...Qxf4
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...gxf4!
- 1...Qxf4
- 1.Rxf7?
- threat
- 2.Sxc5#
- 2.Sxg5#
- 1...Qxd3+
- 2.Bxd3#
- 2.Qxd3#
- 1...Qxf7
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...cxd4
- 2.Sc5#
- 2.Sxg5#
- 1...Qf4
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sdxc5#
- 2.Sxg5#
- 1...Qf5
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sdxc5#
- 2.Sxg5#
- 1...Qf6
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sdxc5#
- 2.Sxg5#
- 1...Rf6
- 2.Sxg5#
- 1...Bf6
- 2.Sxg5#
- 1...Be5
- 2.Sxc5#
- 1...Rxe6!
- threat
- 1.Qb2?
- threat
- 2.Qb7#
- 1...Qxd3+
- 2.Bxd3#
- 1...Qc1+
- 2.Sxc1#
- 1...Bxe6+
- 2.Rexe6#
- 1...Qxb1
- 2.Sxc5#
- 1...Bxe8
- 2.Sxc5#
- 1...cxd4
- 2.Qxd4#
- 1...Qf5
- 2.Se1#
- 1...axb2!
- threat
- 1.Qxd2?
- threat
- 2.Qe3#
- 1...Qxd3+
- 2.Bxd3#
- 2.Qxd3#
- 1...Qc1+
- 2.Sxc1#
- 1...Bxe6+
- 2.Rexe6#
- 1...Qf4
- 2.Se1#
- 1...Qe2
- 2.Qxe2#
- 1...Qe1
- 2.Sc1#
- 2.Sxe1#
- 2.Sf2#
- 2.Sxc5#
- 2.Qg2#
- 1...Qg1
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...Qf2
- 2.Sc1#
- 2.Se1#
- 2.Sxf2#
- 2.Sxc5#
- 1...Qf3
- 2.Sf2#
- 2.Sxc5#
- 1...cxd4!
- threat
- 1.Qxa3?
- threat
- 2.Qa8#
- 1...Qxd3+
- 2.Bxd3#
- 2.Qxd3#
- 1...Qc1+
- 2.Sxc1#
- 1...Bxe6+
- 2.Rexe6#
- 1...Qxb1
- 2.Sxc5#
- 1...Bxe8
- 2.Sxc5#
- 1...Qf5
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...cxd4!
- threat
- 1.Qb3?
- threat
- 2.Qb7#
- 1...Qxd3+
- 2.Bxd3#
- 2.Qxd3#
- 1...Qc1+
- 2.Sxc1#
- 1...Bxe6+
- 2.Rexe6#
- 1...Qxb1
- 2.Sxc5#
- 1...Bxe8
- 2.Sxc5#
- 1...Qf5
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sxc5#
- 1...cxd4!
- threat
- 1.Rf4+?
- Keys
- 1.Qa5!
- threat
- 2.Qa8#
- 1...Qxd3+
- 2.Bxd3#
- 1...Qc1+
- 2.Sxc1#
- 1...Bxe6+
- 2.Rexe6#
- 1...Qxb1
- 2.Sxc5#
- 1...Bxe8
- 2.Sxc5#
- 1...cxd4
- 2.Qe5#
- 1...Qf5
- 2.Se1#
- threat
- 1.Qa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(a);N_PINS(C),P_PINS(G),XB(A)::S(C),XP(g)
- B(j);CHECK,OGATE,P_SPINB(j),XS(G)::R(I),XB(j)
- B(j);XR(I)::S(G),XP(g)
- P(g);OGATE,XB(E)::QAR1(B),XP(g)
- Tries
- Try
- R(H);CHECK
- Refutation
- P(h);XR(H)
- Try
- R(H);XB(j)
- Threat
- DUALS(2)
- Vars
- R(i);::R(I)+S(G),DCHECK,XP(h)
- B(k);::R(I)+S(G),DCHECK,XP(h)
- B(k);::S(G),XP(g)
- Refutation
- R(i);P_SPINR(i),XS(G)
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- Q(a);CHECK,OGATE,P_PINS(G),P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);CHECK,N_PINS(C),P_PINS(G)::B(A)+S(C),XQ(a)
- B(j);CHECK,OGATE,P_SPINB(j),XS(G)::R(I),XB(j)
- Q(a);N_PINS(C),P_PINS(G),XB(A)::S(C),XP(g)
- B(j);XR(I)::S(G),XP(g)
- P(g);OGATE,XB(E)::QAR1(B),XP(g)
- Q(a);N_PINS(C),P_PINS(G)::B(A)+S(C)
- Refutation
- P(d);XQ(B)
- Try
- Q(B);XP(c)
- Threat
- QAR1(B)
- Vars
- Q(a);CHECK,N_PINS(C),P_PINS(G)::B(A)+S(C),XQ(a)
- B(j);CHECK,OGATE,P_SPINB(j),XS(G)::R(I),XB(j)
- Q(a);N_PINS(C),P_PINS(G)::B(A)+S(C)
- Q(a);N_GUARD::QAR2(B),XQ(a)
- Refutation
- P(g);XB(E)
- Try
- Q(B);XP(d)
- Threat
- QAB(B)
- Vars
- Q(a);CHECK,N_PINS(C),P_PINS(G)::B(A)+S(C),XQ(a)
- B(j);CHECK,OGATE,P_SPINB(j),XS(G)::R(I),XB(j)
- Q(a);N_PINS(C),P_PINS(G),XB(A)::S(C),XP(g)
- B(j);XR(I)::S(G),XP(g)
- Refutation
- P(g);XB(E)
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- Q(a);CHECK,N_PINS(C),P_PINS(G)::B(A)+S(C),XQ(a)
- B(j);CHECK,OGATE,P_SPINB(j),XS(G)::R(I),XB(j)
- Q(a);N_PINS(C),P_PINS(G),XB(A)::S(C),XP(g)
- B(j);XR(I)::S(G),XP(g)
- Refutation
- P(g);XB(E)
- Try
- Actual
- Q(B);
- Threat
- QAB(B)
- Vars
- Q(a);CHECK,OGATE,P_PINS(G),P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);CHECK,N_PINS(C),P_PINS(G)::B(A)+S(C),XQ(a)
- B(j);CHECK,OGATE,P_SPINB(j),XS(G)::R(I),XB(j)
- Q(a);N_PINS(C),P_PINS(G),XB(A)::S(C),XP(g)
- B(j);XR(I)::S(G),XP(g)
- P(g);OGATE,XB(E)::QAR1(B)
- Q(a);N_PINS(C),P_PINS(G)::B(A)+S(C)
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).