MESON Chess Problem Database
Problem Display
PID: 62091 (7B/b1p4K/r1b5/2n1Pp1Q/q3NkN1/2P2ppP/4P1P1/4RR2 w - - 0 1)
Forster, Klaus
Die Schwalbe, 1987
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Qh6#
- 1...Bxe4
- 2.e3#
- 1...Sxe4
- 2.Rxf3#
- 1...fxe4
- 2.e3#
- 1...Qxe4
- Tries
- 1.Sd2?
- threat
- 2.Qh6#
- 2.e3#
- 1...fxg4
- 2.e3#
- 1...Qd4
- 2.Qh6#
- 1...Qe4
- 2.Qh6#
- 1...Be4
- 2.e3#
- 1...Bb5
- 2.Rxf3#
- 2.e3#
- 1...Bd5
- 2.e3#
- 1...Bb7
- 2.e3#
- 1...Bd7
- 2.Rxf3#
- 2.e3#
- 1...Ba8
- 2.e3#
- 1...Be8
- 2.Rxf3#
- 2.e3#
- 1...Sb3
- 2.Qh6#
- 1...Sd3
- 2.Qh6#
- 1...Se4
- 2.Rxf3#
- 1...Sb7
- 2.Qh6#
- 1...Sd7
- 2.Qh6#
- 1...Se6!
- threat
- 1.Sxc5?
- threat
- 2.Qh6#
- 2.e3#
- 1...fxg4
- 2.e3#
- 1...Qd4
- 2.Qh6#
- 1...Qe4
- 2.Se6#
- 2.Qh6#
- 1...Be4
- 2.e3#
- 1...Bb5
- 2.Rxf3#
- 2.e3#
- 1...Bd5
- 2.e3#
- 1...Bb7
- 2.e3#
- 1...Bd7
- 2.Rxf3#
- 2.e3#
- 1...Ba8
- 2.e3#
- 1...Be8
- 2.Rxf3#
- 2.e3#
- 1...Bxc5!
- threat
- 1.Sd6?
- threat
- 2.Qxf5#
- 2.Qh6#
- 2.e3#
- 1...fxg4
- 2.Qh6#
- 2.e3#
- 1...Se6
- 2.Qxf5#
- 1...Qc2
- 2.Qh6#
- 2.e3#
- 1...Qd4
- 2.Qxf5#
- 2.Qh6#
- 1...Qe4
- 2.Qh6#
- 1...Be4
- 2.Qh6#
- 2.e3#
- 1...Bd7
- 2.Rxf3#
- 2.Qh6#
- 2.e3#
- 1...Sb3
- 2.Qxf5#
- 2.Qh6#
- 1...Sd3
- 2.Qxf5#
- 2.Qh6#
- 1...Se4
- 2.Rxf3#
- 2.Qxf5#
- 1...Sb7
- 2.Qxf5#
- 2.Qh6#
- 1...Sd7
- 2.Qxf5#
- 2.Qh6#
- 1...cxd6!
- threat
- 1.Sef6?
- threat
- 2.Qh6#
- 2.e3#
- 1...fxg4
- 2.e3#
- 1...Qd4
- 2.Qh6#
- 1...Qe4
- 2.Qh6#
- 1...Sb3
- 2.Qh6#
- 1...Sd3
- 2.Qh6#
- 1...Se4
- 2.Rxf3#
- 1...Sb7
- 2.Qh6#
- 1...Sd7
- 2.Qh6#
- 1...Se6!
- threat
- 1.Sgf2?
- threat
- 2.Qxf3#
- 2.Qg5#
- 2.Qh6#
- 2.e3#
- 1...Ke3
- 2.Qxf3#
- 1...Qxe4
- 2.Qh6#
- 1...Bxe4
- 2.e3#
- 1...fxe2
- 2.Qf3#
- 2.Qg5#
- 2.Qh6#
- 1...fxg2
- 2.Qf3#
- 2.Qg5#
- 2.Qh6#
- 2.e3#
- 1...gxf2
- 2.Qxf3#
- 1...fxe4
- 2.e3#
- 1...Se6
- 2.Qxf3#
- 1...Qd4
- 2.Qxf3#
- 2.Qg5#
- 2.Qh6#
- 1...Bb5
- 2.Qxf3#
- 2.Qg5#
- 2.e3#
- 1...Bd5
- 2.Qxf3#
- 2.Qg5#
- 2.e3#
- 1...Bb7
- 2.Qxf3#
- 2.Qg5#
- 2.e3#
- 1...Bd7
- 2.Qxf3#
- 2.Qg5#
- 2.e3#
- 1...Ba8
- 2.Qxf3#
- 2.Qg5#
- 2.e3#
- 1...Be8
- 2.Qxf3#
- 2.Qg5#
- 2.e3#
- 1...Sb3
- 2.Qxf3#
- 2.Qg5#
- 2.Qh6#
- 1...Sd3
- 2.Qxf3#
- 2.Qg5#
- 2.Qh6#
- 1...Sb7
- 2.Qxf3#
- 2.Qg5#
- 2.Qh6#
- 1...Sd7
- 2.Qxf3#
- 2.Qg5#
- 2.Qh6#
- 1...Sxe4!
- threat
- 1.Se3?
- threat
- 2.Qxf3#
- 1...Kxe3
- 2.Qxf3#
- 1...Kxe4
- 2.Qxf3#
- 1...Qxe4
- 2.Qh6#
- 1...Sxe4
- 2.Rxf3#
- 1...fxe4
- 2.Qh6#
- 1...f2
- 2.Qf3#
- 1...Bxe4!
- threat
- 1.Sh6?
- threat
- 2.Qxf3#
- 1...Ke3
- 2.Qxf3#
- 1...Kxe4
- 2.Qxf3#
- 1...Bxe4
- 2.e3#
- 1...Sxe4
- 2.Rxf3#
- 1...fxe4
- 2.e3#
- 1...f2
- 2.Qf3#
- 1...Qxe4!
- threat
- 1.Sd2?
- Keys
- 1.Sh2!
- threat
- 2.Qxf3#
- 1...Ke3
- 2.Qxf3#
- 1...Kxe4
- 2.Qxf3#
- 1...Qxe4
- 2.Qh6#
- 1...Bxe4
- 2.e3#
- 1...Sxe4
- 2.Rxf3#
- 1...fxe4
- 2.e3#
- 1...f2
- 2.Qf3#
- threat
- 1.Sh2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(c);SBLOCK,XS(G)::QAB(J)
- B(h);SBLOCK,XS(G)::P(C)
- S(e);SBLOCK,XS(G)::R1(B),XP(a)
- P(f);SBLOCK,XS(G)::P(C)
- Tries
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- P(f);XS(H)::P(C)
- Q(c);::QAB(J)
- B(h);::P(C)
- S(e);::QAB(J)
- S(e);S_CUTB(h)::R1(B),XP(a)
- Refutation
- S(e);
- Try
- S(G);XS(e)
- Threat
- DUALS(2)
- Vars
- P(f);XS(H)::P(C)
- Q(c);::QAB(J)
- B(h);::P(C)
- Refutation
- B(i);XS(G)
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- S(e);::QAR1(J),XP(f)
- Q(c);::QAB(J)
- Refutation
- P(j);XS(G)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- P(f);XS(H)::P(C)
- Q(c);::QAB(J)
- S(e);::QAB(J)
- S(e);S_CUTB(h)::R1(B),XP(a)
- Refutation
- S(e);
- Try
- S(H);N_PINP(a)
- Threat
- DUALS(4)
- Vars
- K(d);S_FLIGHT::QAR1(J),XP(a)
- Q(c);XS(G)::QAB(J)
- B(h);XS(G)::P(C)
- P(b);XS(H)::QAR1(J),XP(a)
- P(f);XS(G)::P(C)
- S(e);::QAR1(J),XP(a)
- Refutation
- S(e);XS(G)
- Try
- S(H);
- Threat
- QAR1(J),XP(a)
- Vars
- K(d);N_SPINP(a),S_FLIGHT,XS(H)::QAR1(J),XP(a)
- K(d);N_SPINP(a),P-FLIGHT,XS(G)::QAB1(J),XP(a)
- Q(c);SBLOCK,XS(G)::QAB(J)
- S(e);SBLOCK,XS(G)::R1(B),XP(a)
- P(f);SBLOCK,XS(G)::QAB(J)
- P(a);::QAR1(J)
- Refutation
- B(h);XS(G)
- Try
- S(H);
- Threat
- QAR1(J),XP(a)
- Vars
- K(d);N_SPINP(a),S_FLIGHT::QAR1(J),XP(a)
- K(d);N_SPINP(a),P-FLIGHT,XS(G)::QAB1(J),XP(a)
- B(h);SBLOCK,XS(G)::P(C)
- S(e);SBLOCK,XS(G)::R1(B),XP(a)
- P(f);SBLOCK,XS(G)::P(C)
- P(a);::QAR1(J)
- Refutation
- Q(c);XS(G)
- Try
- Actual
- S(H);
- Threat
- QAR1(J),XP(a)
- Vars
- K(d);N_SPINP(a),S_FLIGHT::QAR1(J),XP(a)
- K(d);N_SPINP(a),P-FLIGHT,XS(G)::QAB1(J),XP(a)
- Q(c);SBLOCK,XS(G)::QAB(J)
- B(h);SBLOCK,XS(G)::P(C)
- S(e);SBLOCK,XS(G)::R1(B),XP(a)
- P(f);SBLOCK,XS(G)::P(C)
- P(a);::QAR1(J)
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).