MESON Chess Problem Database
Problem Display
PID: 78693 (5B2/2n3Q1/3pb2R/N1pk1p1P/3P1R1P/3P3K/5pNp/5nbq w - - 0 1)
Gevers, Raymond
Die Schwalbe, 1934
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxg2+
- 2.Qxg2#
- 1...Bd7
- 2.Rxd6#
- 1...Bf7
- 2.Rxf5#
- 2.Rxd6#
- 1...Bc8
- 2.Rxd6#
- 1...Bg8
- 2.Rxf5#
- 2.Rxd6#
- 1...Sd2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sb5
- 2.Qb7#
- 1...Sa6
- 2.Qb7#
- 1...Sa8
- 2.Qb7#
- 1...Se8
- 2.Qb7#
- 1...cxd4
- 2.Qxd4#
- 1...c4
- 2.dxc4#
- 1...Qxg2+
- Tries
- 1.Rf6?
- 1...Qxg2+
- 2.Qxg2#
- 1...Bd7
- 2.Rxd6#
- 1...Bf7
- 2.Rxd6#
- 1...Bc8
- 2.Rxd6#
- 1...Bg8
- 2.Rxd6#
- 1...Sd2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sb5
- 2.Qb7#
- 1...Sa6
- 2.Qb7#
- 1...Sa8
- 2.Qb7#
- 1...Se8
- 2.Qb7#
- 1...c4
- 2.dxc4#
- 1...cxd4!
- 1...Qxg2+
- 1.Rg6?
- 1...cxd4
- 2.Qxd4#
- 1...Bd7
- 2.Rxd6#
- 1...Bf7
- 2.Rxf5#
- 2.Rxd6#
- 1...Bc8
- 2.Rxd6#
- 1...Bg8
- 2.Rxf5#
- 2.Rxd6#
- 1...Sd2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sb5
- 2.Qb7#
- 1...Sa6
- 2.Qb7#
- 1...Sa8
- 2.Qb7#
- 1...Se8
- 2.Qb7#
- 1...c4
- 2.dxc4#
- 1...Qxg2+!
- 1...cxd4
- 1.Qf6?
- 1...cxd4
- 2.Qxd4#
- 1...Bd7
- 2.Qxd6#
- 1...Bf7
- 2.Rxf5#
- 2.Qxf5#
- 2.Qxd6#
- 1...Bc8
- 2.Qxd6#
- 1...Bg8
- 2.Rxf5#
- 2.Qxf5#
- 2.Qxd6#
- 1...Sd2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sb5
- 2.Qxe6#
- 1...Sa6
- 2.Qxe6#
- 1...Sa8
- 2.Qxe6#
- 1...Se8
- 2.Qxe6#
- 1...c4
- 2.dxc4#
- 1...Qxg2+!
- 1...cxd4
- 1.Qg3?
- threat
- 2.Qf3#
- 1...Qxg2+
- 2.Qxg2#
- 1...Sxg3
- 2.Se3#
- 1...Sd2
- 2.Se3#
- 1...cxd4!
- threat
- 1.Qg6?
- 1...Qxg2+
- 2.Qxg2#
- 1...Sb5
- 2.Qxe6#
- 1...Bd7
- 2.Qxd6#
- 1...Bf7
- 2.Qxf5#
- 2.Qxd6#
- 1...Bc8
- 2.Qxd6#
- 1...Bg8
- 2.Qxf5#
- 2.Qxd6#
- 1...Sd2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sa6
- 2.Qxe6#
- 1...Sa8
- 2.Qxe6#
- 1...Se8
- 2.Qxe6#
- 1...c4
- 2.dxc4#
- 1...cxd4!
- 1...Qxg2+
- 1.Qxc7?
- threat
- 2.Qxd6#
- 2.Qc6#
- 2.Qb7#
- 1...cxd4
- 2.Qxd6#
- 1...Bd7
- 2.Rxd6#
- 2.Qxd6#
- 1...Bc8
- 2.Rxd6#
- 2.Qxd6#
- 2.Qc6#
- 1...Qxg2+!
- threat
- 1.Qd7?
- threat
- 2.Qc6#
- 2.Qxd6#
- 1...Bxd7
- 2.Rxd6#
- 1...cxd4
- 2.Qxd6#
- 1...Sb5
- 2.Qc6#
- 2.Qxe6#
- 2.Qb7#
- 1...Se8
- 2.Qc6#
- 2.Qxe6#
- 2.Qb7#
- 1...Qxg2+!
- threat
- 1.Qe7?
- threat
- 2.Qxd6#
- 1...Sb5
- 2.Qxe6#
- 2.Qb7#
- 1...Se8
- 2.Qxe6#
- 2.Qb7#
- 1...Qxg2+!
- threat
- 1.Qf7?
- 1...Bxf7
- 2.Rxd6#
- 1...cxd4
- 2.Rxf5#
- 1...Sb5
- 2.Qxe6#
- 2.Qb7#
- 1...Sd2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sa6
- 2.Qxe6#
- 2.Qb7#
- 1...Sa8
- 2.Qxe6#
- 2.Qb7#
- 1...Se8
- 2.Qxe6#
- 2.Qb7#
- 1...c4
- 2.dxc4#
- 1...Qxg2+!
- 1...Bxf7
- 1.Rf6?
- Keys
- 1.Qg8!
- 1...Qxg2+
- 2.Qxg2#
- 1...Bxg8
- 2.Rxd6#
- 1...cxd4
- 2.Rxf5#
- 1...Sb5
- 2.Qxe6#
- 1...Bf7
- 2.Rxd6#
- 1...Sd2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sa6
- 2.Qxe6#
- 1...Sa8
- 2.Qxe6#
- 1...Se8
- 2.Qxe6#
- 1...c4
- 2.dxc4#
- 1...Qxg2+
- 1.Qg8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(c);CHECK,OGATE,XS(A)::QAB(J),XQ(c)
- B(j);OGATE::R1(I),XP(i)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(k);OGATE::QAB(J)
- P(f);OGATE,XP(D)::QAR1(J),XP(f)
- P(f);OGATE::P(B),XP(f)
- Tries
- Try
- R(I);
- Vars
- Q(c);CHECK,OGATE,XS(A)::QAB(J),XQ(c)
- B(j);OGATE::R1(I),XP(i)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(k);OGATE::QAB(J)
- P(f);OGATE::P(B),XP(f)
- Refutation
- P(f);XP(D)
- Try
- R(I);
- Vars
- P(f);OGATE,XP(D)::QAR1(J),XP(f)
- B(j);OGATE::R1(I),XP(i)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(k);OGATE::QAB(J)
- P(f);OGATE::P(B),XP(f)
- Refutation
- Q(c);CHECK,XS(A)
- Try
- Q(J);
- Vars
- P(f);OGATE,XP(D)::QAR1(J),XP(f)
- B(j);OGATE::QAR1(J),XP(i)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(k);N_GUARD::QAB1(J),XB(j)
- P(f);OGATE::P(B),XP(f)
- Refutation
- Q(c);CHECK,XS(A)
- Try
- Q(J);
- Threat
- QAB(J)
- Vars
- Q(c);CHECK,OGATE,XS(A)::QAB(J),XQ(c)
- S(a);N_GUARD,XQ(J)::S(A)
- S(a);N_GUARD::S(A)
- Refutation
- P(f);XP(D)
- Try
- Q(J);
- Vars
- Q(c);CHECK,OGATE,XS(A)::QAB(J),XQ(c)
- S(k);N_GUARD::QAB1(J),XB(j)
- B(j);OGATE::QAR1(J),XP(i)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(f);OGATE::P(B),XP(f)
- Refutation
- P(f);XP(D)
- Try
- Q(J);XS(k)
- Threat
- DUALS(3)
- Vars
- P(f);XP(D)::QAR1(J),XP(i)
- Refutation
- Q(c);CHECK,XS(A)
- Try
- Q(J);P_PINP(i)
- Threat
- DUALS(2)
- Vars
- B(j);N_SPINP(i),OGATE,XQ(J)::R1(I),XP(i)
- P(f);XP(D)::QAR1(J),XP(i)
- Refutation
- Q(c);CHECK,XS(A)
- Try
- Q(J);
- Threat
- QAR1(J),XP(i)
- Refutation
- Q(c);CHECK,XS(A)
- Try
- Q(J);P_PINB(j)
- Vars
- B(j);N_SPINB(j),OGATE,XQ(J)::R1(I),XP(i)
- P(f);SBLOCK,XP(D)::R(E),XP(h)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(f);OGATE::P(B),XP(f)
- Refutation
- Q(c);CHECK,XS(A)
- Try
- Actual
- Q(J);P_PINB(j)
- Vars
- Q(c);CHECK,OGATE,XS(A)::QAB(J),XQ(c)
- B(j);N_SPINB(j),OGATE,XQ(J)::R1(I),XP(i)
- P(f);SBLOCK,XP(D)::R(E),XP(h)
- S(k);N_GUARD::QAB1(J),XB(j)
- B(j);OGATE::R1(I),XP(i)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(f);OGATE::P(B),XP(f)
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).