MESON Chess Problem Database
Problem Display
PID: 268740 (2n5/8/6pN/1Q2p2p/2qNpk1P/4p1RK/6n1/2BB4 w - - 0 1)
Paslack, Rainer
Die Schwalbe, 1975
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Se6#
- 2.Qxf1#
- 1...Qe2
- 2.Sxe2#
- 2.Se6#
- 1...Qb3
- 2.Se2#
- 2.Qf1#
- 1...Qd3
- 2.Se6#
- 1...Qxb5
- 2.Se6#
- 1...Qd5
- 2.Se2#
- 2.Qf1#
- 1...Qe6+
- 2.Sxe6#
- 1...Qf7
- 2.Se2#
- 2.Qf1#
- 1...Qg8
- 2.Se2#
- 2.Qf1#
- 1...Qxc1
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 1...Qc2
- 2.Se6#
- 1...Qc3
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 1...Qa4
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 1...Qb4
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 1...Qxd4
- 2.Qf1#
- 1...Qc5
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 1...Qc6
- 2.Se2#
- 2.Qf1#
- 1...Qc7
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 1...Se1
- 2.Bxe3#
- 1...Sxh4
- 2.Bxe3#
- 1...exd4
- 2.Qg5#
- 1...Qf1
- Tries
- 1.Sg4?
- threat
- 2.Qxe5#
- 1...hxg4+
- 2.Rxg4#
- 1...Qxd4
- 2.Qf1#
- 1...exd4
- 2.Qe5#
- 2.Qg5#
- 1...Qd5
- 2.Qf1#
- 1...Qe6
- 2.Qf1#
- 1...Qc5
- 2.Qf1#
- 1...Qc7
- 2.Qf1#
- 1...Qxb5!
- threat
- 1.Bxh5?
- threat
- 2.Rg4#
- 1...Qe6+
- 2.Sxe6#
- 1...Qxd4
- 2.Qf1#
- 1...exd4
- 2.Qg5#
- 1...Qe2
- 2.Sxe2#
- 2.Se6#
- 1...gxh5!
- threat
- 1.Qxc4?
- threat
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 2.Qf7#
- 1...Sxh4
- 2.Se2#
- 2.Se6#
- 2.Bxe3#
- 1...Se1
- 2.Se2#
- 2.Se6#
- 2.Bxe3#
- 2.Qf7#
- 1...Sd6
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 1...Se7
- 2.Se2#
- 2.Se6#
- 2.Qf1#
- 1...exd4!
- threat
- 1.Qb2?
- threat
- 2.Qf2#
- 1...Qe6+
- 2.Sxe6#
- 1...Qxc1
- 2.Se2#
- 2.Se6#
- 1...Sxh4
- 2.Bxe3#
- 1...Qf1
- 2.Se6#
- 1...Qa2
- 2.Se2#
- 1...Qe2
- 2.Sxe2#
- 2.Se6#
- 1...Qc2
- 2.Se6#
- 1...Se1
- 2.Bxe3#
- 1...exd4!
- threat
- 1.Qd5?
- threat
- 2.Se6#
- 1...Qxd5
- 2.Se2#
- 1...Qxd4
- 2.Qf7#
- 1...exd4
- 2.Qg5#
- 1...Qc6
- 2.Se2#
- 1...Qa6!
- threat
- 1.Sg4?
- Keys
- 1.Rg5!
- threat
- 2.Qxe5#
- 1...Qe6+
- 2.Sxe6#
- 1...Qxb5
- 2.Se6#
- 1...Qxd4
- 2.Qf1#
- 1...exd4
- 2.Qe5#
- 1...Qd5
- 2.Qf1#
- 1...Qc5
- 2.Se6#
- 2.Qf1#
- 1...Qc7
- 2.Se6#
- 2.Qf1#
- threat
- 1.Rg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- Q(c);N_GUARD::S(E)
- Q(c);N_GUARD,XQ(G)::S(E)
- Q(c);CHECK,N_GUARD::S(E),XQ(c)
- Q(c);OGATE,XS(E)::QAR(G)
- S(a);N_GUARD::B(A),XP(b)
- S(a);N_GUARD,XP(F)::B(A),XP(b)
- P(f);OGATE,XS(E)::QAB1(G)
- Tries
- Try
- S(H);
- Threat
- QAB1(G),XP(f)
- Vars
- P(g);CHECK,OGATE,XS(H)::R1(C),XP(g)
- Q(c);OGATE,XS(E)::QAR(G)
- Q(c);OGATE::QAR(G)
- Q(c);OGATE,P_PINS(H)::QAR(G)
- Refutation
- Q(c);XQ(G)
- Try
- B(B);XP(g)
- Threat
- R1(C)
- Vars
- Q(c);CHECK,N_GUARD::S(E),XQ(c)
- Q(c);OGATE,XS(E)::QAR(G)
- P(f);OGATE,XS(E)::QAB1(G)
- Refutation
- P(h);XB(B)
- Try
- Q(G);XQ(c)
- Threat
- DUALS(4)
- Refutation
- P(f);XS(E)
- Try
- Q(G);
- Threat
- QAR2(G)
- Vars
- Q(c);CHECK,N_GUARD::S(E),XQ(c)
- S(a);N_GUARD,XP(F)::B(A),XP(b)
- Q(c);N_GUARD::S(E)
- S(a);N_GUARD::B(A),XP(b)
- Refutation
- P(f);XS(E)
- Try
- Q(G);
- Threat
- S(E)
- Vars
- Q(c);N_GUARD,XQ(G)::S(E)
- Q(c);N_GUARD,XS(E)::QAR(G)
- P(f);OGATE,XS(E)::QAB1(G)
- Q(c);N_GUARD::S(E)
- Refutation
- Q(c);
- Try
- Actual
- R(C);
- Threat
- QAB1(G),XP(f)
- Vars
- Q(c);CHECK,N_GUARD::S(E),XQ(c)
- Q(c);N_GUARD,XQ(G)::S(E)
- Q(c);OGATE,XS(E)::QAR(G)
- P(f);XS(E)::QAB1(G)
- Q(c);OGATE::QAR(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).