MESON Chess Problem Database
Problem Display
PID: 232431 (8/Bn1b4/Q7/1qP1N3/1p1k4/1P1P1B2/1NK1Rp2/8 w - - 0 1)
Degenkolbe, Mirko
Freie Presse, 1983
#2
10 + 6
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxd3+
- 2.Qxd3#
- 1...Qa4
- 2.Qc4#
- 1...Qc4+
- 2.Qxc4#
- 1...Qc6
- 2.Qc4#
- 1...Qa5
- 2.Qc4#
- 1...Qxc5+
- 2.Qc4#
- 1...Qb6
- 2.Qc4#
- 1...Sa5
- 2.Qd6#
- 1...Sxc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Qxd3+
- Tries
- 1.Sd1?
- threat
- 2.Qa1#
- 1...Qxd3+
- 2.Qxd3#
- 1...Qc4+
- 2.Qxc4#
- 1...Qxc5+
- 2.Qc4#
- 1...Qb6
- 2.Qc4#
- 1...Qa4
- 2.Qc4#
- 1...Qa5
- 2.Qc4#
- 1...Sa5
- 2.Qd6#
- 1...Qxa6!
- threat
- 1.Sc6+?
- 1...Qxc6
- 2.Qc4#
- 1...Bxc6!
- 1...Qxc6
- 1.Sxd7?
- threat
- 2.Qf6#
- 1...Qxd3+
- 2.Qxd3#
- 1...Qc4+
- 2.Qxc4#
- 1...Qxc5+
- 2.Qc4#
- 1...Qc6
- 2.Qc4#
- 1...Qb6
- 2.Qc4#
- 1...Sd6
- 2.Qxd6#
- 1...Qxa6!
- threat
- 1.Bc6?
- threat
- 2.Sf3#
- 2.Re4#
- 1...Qxd3+
- 2.Qxd3#
- 1...Qc4+
- 2.Qxc4#
- 1...Qxc5+
- 2.Qc4#
- 1...Qxc6
- 2.Qc4#
- 1...Qb6
- 2.Qc4#
- 1...f1Q
- 2.Re4#
- 1...f1R
- 2.Re4#
- 1...Bg4
- 2.Re4#
- 1...Bf5
- 2.Sf3#
- 1...Sd6
- 2.Sf3#
- 1...Bxc6!
- threat
- 1.Bxb7?
- threat
- 2.Sf3#
- 2.Re4#
- 2.Qd6#
- 1...Qxd3+
- 2.Qxd3#
- 1...Qc4+
- 2.Qxc4#
- 1...Qxc5+
- 2.Qc4#
- 1...Qxa6
- 2.Sf3#
- 2.Re4#
- 1...Qxb7
- 2.Qc4#
- 1...Qc6
- 2.Qc4#
- 1...Qb6
- 2.Qc4#
- 1...f1Q
- 2.Re4#
- 2.Qd6#
- 1...f1R
- 2.Re4#
- 2.Qd6#
- 1...Bg4
- 2.Re4#
- 2.Qd6#
- 1...Bf5
- 2.Sf3#
- 2.Qd6#
- 1...Be6
- 2.Sf3#
- 2.Re4#
- 1...Bc6!
- threat
- 1.Qxb5?
- threat
- 2.Qc4#
- 2.Qxb4#
- 1...Be6
- 2.Sc6#
- 1...Sa5
- 2.Qxd7#
- 2.c6#
- 1...Sd6
- 2.cxd6#
- 2.c6#
- 1...Bxb5!
- threat
- 1.Qf6?
- threat
- 2.Sec4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sxd7#
- 2.Sf7#
- 2.Qf4#
- 1...Qxd3+
- 2.Sexd3#
- 1...Qc4+
- 2.Sexc4#
- 1...Qxc5+
- 2.Sec4#
- 1...Qa6
- 2.Sc6#
- 2.Qf4#
- 1...Qc6
- 2.Sxc6#
- 1...Bh3
- 2.Sec4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qf4#
- 1...Bg4
- 2.Sec4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qf4#
- 1...Bf5
- 2.Sec4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Bc6
- 2.Sec4#
- 2.Sg4#
- 2.Sxc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Be6
- 2.Sec4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qf4#
- 1...Bc8
- 2.Sec4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qf4#
- 1...Be8
- 2.Sec4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qh4#
- 2.Qf4#
- 1...Sd6
- 2.Sec4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sxd7#
- 2.Sf7#
- 2.Qxd6#
- 1...Qb6!
- threat
- 1.c6+?
- 1...Qc5+
- 2.Qc4#
- 1...Qb6
- 2.Qc4#
- 1...Sc5!
- 1...Qc5+
- 1.Sd1?
- Keys
- 1.Qa1!
- threat
- 2.Sd1#
- 2.Sa4#
- 2.Sbc4#
- 1...Qxd3+
- 2.Sbxd3#
- 1...Qc4+
- 2.Sbxc4#
- 1...Qxc5+
- 2.Sbc4#
- 1...Qb6
- 2.Sa4#
- 1...f1Q
- 2.Sd1#
- 1...f1R
- 2.Sd1#
- 1...Qa4
- 2.Sxa4#
- 1...Qa6
- 2.Sa4#
- 1...Qa5
- 2.Sa4#
- threat
- 1.Qa1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 6
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- Q(d);CHECK,OGATE,XP(E)::QAR1(I),XQ(d)
- Q(d);OGATE,P_PINP(D)::QAR1(I)
- Q(d);CHECK,OGATE::QAR1(I),XQ(d)
- Q(d);OGATE,P_PINP(G)::QAR1(I)
- Q(d);OGATE::QAR1(I)
- Q(d);CHECK,OGATE,P_SPINQ(d),XP(G)::QAR1(I)
- S(e);N_GUARD::QAR2(I)
- S(e);N_GUARD,P_SPINS(e),XP(G)::QAR2(I)
- S(e);N_GUARD::QAR2(I),XS(e)
- Tries
- Try
- S(A);
- Threat
- QAB(I)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(I),XQ(d)
- Q(d);CHECK,OGATE::QAR1(I),XQ(d)
- Q(d);CHECK,OGATE,P_SPINQ(d),XP(G)::QAR1(I)
- Q(d);OGATE::QAR1(I)
- Q(d);OGATE,P_PINP(D)::QAR1(I)
- S(e);N_GUARD::QAR2(I)
- Refutation
- Q(d);XQ(I)
- Try
- S(H);CHECK
- Vars
- Q(d);OGATE,P_PINP(G),XS(H)::QAR1(I)
- Refutation
- B(f);XS(H)
- Try
- S(H);XB(f)
- Threat
- QAB(I)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(I),XQ(d)
- Q(d);CHECK,OGATE::QAR1(I),XQ(d)
- Q(d);CHECK,OGATE,P_SPINQ(d),XP(G)::QAR1(I)
- Q(d);OGATE,P_PINP(G)::QAR1(I)
- Q(d);OGATE::QAR1(I)
- S(e);N_GUARD::QAR2(I),XS(e)
- Refutation
- Q(d);XQ(I)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(I),XQ(d)
- Q(d);CHECK,OGATE::QAR1(I),XQ(d)
- Q(d);CHECK,OGATE,P_SPINQ(d),XP(G)::QAR1(I)
- Q(d);OGATE,P_PINP(G),XB(F)::QAR1(I)
- Q(d);OGATE::QAR1(I)
- P(a);::R1(C)
- B(f);::R1(C)
- B(f);P_PINP(E)::S(H)
- S(e);::S(H)
- Refutation
- B(f);XB(F)
- Try
- B(F);XS(e)
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK,OGATE,XP(E)::QAR1(I),XQ(d)
- Q(d);CHECK,OGATE::QAR1(I),XQ(d)
- Q(d);CHECK,OGATE,P_SPINQ(d),XP(G)::QAR1(I)
- Q(d);OGATE,XB(F)::QAR1(I)
- Q(d);OGATE,P_PINP(G)::QAR1(I)
- Q(d);OGATE::QAR1(I)
- Refutation
- B(f);
- Try
- Q(I);XQ(d)
- Threat
- DUALS(2)
- Vars
- B(f);N_GUARD::S(H)
- Refutation
- B(f);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(7)
- Vars
- Q(d);CHECK,XP(E)::QAB(I)+S(H),XQ(d)
- Q(d);CHECK::QAB(I)+S(H),XQ(d)
- Q(d);CHECK,P_SPINQ(d),XP(G)::QAB(I)+S(H)
- Q(d);P_PINP(G)::QAB(I)+S(H),DCHECK,XQ(d)
- Refutation
- Q(d);
- Try
- P(G);CHECK
- Vars
- Q(d);CHECK,OGATE,P_SPINQ(d)::QAR1(I)
- Q(d);OGATE,P_SPINQ(d)::QAR1(I)
- Refutation
- S(e);P_SPINS(e)
- Try
- Actual
- Q(I);
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK,XP(E)::QAB(I)+S(A),XQ(d)
- Q(d);CHECK::QAB(I)+S(A),XQ(d)
- Q(d);CHECK,P_SPINQ(d),XP(G)::QAB(I)+S(A)
- Q(d);::QAB(I)+S(A)
- P(a);::QAB(I)+S(A)
- Q(d);P_PINP(D)::QAB(I)+S(A),XQ(d)
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).