MESON Chess Problem Database
Problem Display
PID: 43492 (3R4/2N1K3/1pRN1p2/BP1BpP2/n2k2qQ/4p3/2Pn4/8 w - - 0 1)
Forster, Klaus
Schach-Aktiv, 2002
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Sb1
- 2.Rc4#
- 1...Sf1
- 2.Rc4#
- 1...Sb3
- 2.Rc4#
- 1...Sf3
- 2.Rc4#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...Sb2
- 2.Bc3#
- 2.Bxb6#
- 1...Sc3
- 2.Bxc3#
- 2.Bxb6#
- 1...e2
- 2.Qf2#
- 1...e4
- 2.Qxf6#
- 1...Sb1
- Tries
- 1.Sb7?
- threat
- 2.Se6#
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 1...e2
- 2.Qf2#
- 1...e4
- 2.Qxf6#
- 1...Qe4
- 2.Se6#
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bxe4#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 1...Sf3
- 2.Se6#
- 2.Bxf3#
- 2.Rc4#
- 1...Sc4
- 2.Se6#
- 2.Rxc4#
- 1...Se4
- 2.Se6#
- 2.Rc4#
- 1...Sc3
- 2.Se6#
- 2.Bxc3#
- 2.Bxb6#
- 1...Sc5!
- threat
- 1.Sf7?
- threat
- 2.Se6#
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 1...e2
- 2.Qf2#
- 1...Qe4
- 2.Se6#
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bxe4#
- 2.Be6#
- 1...Sf3
- 2.Se6#
- 2.Bxf3#
- 2.Rc4#
- 1...Sc4
- 2.Se6#
- 2.Rxc4#
- 1...Se4
- 2.Se6#
- 2.Rc4#
- 1...Sc3
- 2.Se6#
- 2.Bxc3#
- 2.Bxb6#
- 1...e4
- 2.Se6#
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Be6#
- 2.Qxf6#
- 1...Sc5!
- threat
- 1.Sc8?
- threat
- 2.Se6#
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 1...e2
- 2.Qf2#
- 1...e4
- 2.Qxf6#
- 1...Qe4
- 2.Se6#
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bxe4#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 1...Sf3
- 2.Se6#
- 2.Bxf3#
- 2.Rc4#
- 1...Sc4
- 2.Se6#
- 2.Rxc4#
- 1...Se4
- 2.Se6#
- 2.Rc4#
- 1...Sc3
- 2.Se6#
- 2.Bxc3#
- 2.Bxb6#
- 1...Sc5!
- threat
- 1.Sde8?
- threat
- 2.Se6#
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 1...e2
- 2.Qf2#
- 1...e4
- 2.Qxf6#
- 1...Qe4
- 2.Se6#
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Bxe4#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 1...Sf3
- 2.Se6#
- 2.Bxf3#
- 2.Rc4#
- 1...Sc4
- 2.Se6#
- 2.Rxc4#
- 1...Se4
- 2.Se6#
- 2.Rc4#
- 1...Sc3
- 2.Se6#
- 2.Bxc3#
- 2.Bxb6#
- 1...Sc5!
- threat
- 1.Bxd2?
- threat
- 2.Rc4#
- 1...exd2
- 2.Qf2#
- 1...e4
- 2.Qxf6#
- 1...Sb2
- 2.Bc3#
- 1...Sc5!
- threat
- 1.Bh1?
- threat
- 2.Sc4#
- 2.Se4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 2.Se6#
- 1...bxa5
- 2.Se4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 2.Se6#
- 1...e2
- 2.Sc4#
- 2.Qf2#
- 1...e4
- 2.Sc4#
- 2.Sf7#
- 2.Qxf6#
- 1...Qe4
- 2.Sc4#
- 2.Sxe4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 1...Sf3
- 2.Rc4#
- 1...Sc4
- 2.Sxc4#
- 2.Se6#
- 2.Rxc4#
- 1...Se4
- 2.Sxe4#
- 2.Rc4#
- 1...Sc3
- 2.Se6#
- 2.Bxc3#
- 2.Bxb6#
- 1...Sc5!
- threat
- 1.Ba2?
- threat
- 2.Se6#
- 1...e2
- 2.Qf2#
- 1...e4
- 2.Sc4#
- 2.Sf7#
- 2.Qxf6#
- 1...Sb3
- 2.Rc4#
- 1...Sc4
- 2.Rxc4#
- 1...Sc5!
- threat
- 1.Bg2?
- threat
- 2.Sc4#
- 2.Se4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 2.Se6#
- 1...bxa5
- 2.Se4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 2.Se6#
- 1...e2
- 2.Sc4#
- 2.Qf2#
- 1...e4
- 2.Sc4#
- 2.Sf7#
- 2.Qxf6#
- 1...Qe4
- 2.Sc4#
- 2.Sxe4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 1...Sf3
- 2.Rc4#
- 1...Sc4
- 2.Sxc4#
- 2.Se6#
- 2.Rxc4#
- 1...Se4
- 2.Sxe4#
- 2.Rc4#
- 1...Sc3
- 2.Se6#
- 2.Bxc3#
- 2.Bxb6#
- 1...Sc5!
- threat
- 1.Bb3?
- threat
- 2.Se6#
- 1...Sxb3
- 2.Rc4#
- 1...e2
- 2.Qf2#
- 1...e4
- 2.Sc4#
- 2.Sf7#
- 2.Qxf6#
- 1...Sc4
- 2.Rxc4#
- 1...Sc5!
- threat
- 1.Bf3?
- threat
- 2.Sc4#
- 2.Se4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 2.Se6#
- 1...Sxf3
- 2.Rc4#
- 1...bxa5
- 2.Se4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 2.Se6#
- 1...e2
- 2.Sc4#
- 2.Qf2#
- 1...e4
- 2.Sc4#
- 2.Sf7#
- 2.Qxf6#
- 1...Qe4
- 2.Sc4#
- 2.Sxe4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 1...Sc4
- 2.Sxc4#
- 2.Se6#
- 2.Rxc4#
- 1...Se4
- 2.Sxe4#
- 2.Rc4#
- 1...Sc3
- 2.Se6#
- 2.Bxc3#
- 2.Bxb6#
- 1...Sc5!
- threat
- 1.Bc4?
- threat
- 2.Se6#
- 1...Sxc4
- 2.Rxc4#
- 1...e2
- 2.Qf2#
- 1...e4
- 2.Sf7#
- 2.Qxf6#
- 1...Sc5
- 2.c3#
- 1...bxa5!
- threat
- 1.Be4?
- threat
- 2.Se6#
- 1...Qg7+
- 2.Sf7#
- 1...Qxf5
- 2.Sxf5#
- 1...Qxe4
- 2.Sc4#
- 2.Sxe4#
- 2.Sb7#
- 2.Sf7#
- 2.Sc8#
- 2.Sde8#
- 1...Sxe4
- 2.Rc4#
- 1...e2
- 2.Qf2#
- 1...Sc5
- 2.c3#
- 1...Qg8!
- threat
- 1.Qxg4+?
- 1...Se4
- 2.Rc4#
- 2.Qxe4#
- 1...e4!
- 1...Se4
- 1.Sb7?
- Keys
- 1.Se4!
- threat
- 2.Se6#
- 1...Qg7+
- 2.Bf7#
- 1...Qxf5
- 2.Be6#
- 1...e2
- 2.Qf2#
- 1...Qg8
- 2.Bxg8#
- 1...Sc5
- 2.Bc3#
- threat
- 1.Se4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 7
- Sets
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- S(a);N_GUARD,N_SPINQ(e)::R1(G)
- P(b);OGATEB::QAB(B)
- P(f);N_SPINQ(e),OGATEB::QAB(B),XP(h)
- Tries
- Try
- S(H);
- Threat
- DUALS(4)
- Vars
- P(b);OGATEB::QAB(B)
- P(f);N_SPINQ(e),OGATEB::QAB(B),XP(h)
- Refutation
- S(c);
- Try
- S(H);
- Threat
- DUALS(4)
- Vars
- P(b);OGATEB::QAB(B)
- Refutation
- S(c);
- Try
- S(H);
- Threat
- DUALS(4)
- Vars
- P(b);OGATEB::QAB(B)
- P(f);N_SPINQ(e),OGATEB::QAB(B),XP(h)
- Refutation
- S(c);
- Try
- S(H);
- Threat
- DUALS(4)
- Vars
- P(b);OGATEB::QAB(B)
- P(f);N_SPINQ(e),OGATEB::QAB(B),XP(h)
- Refutation
- S(c);
- Try
- B(C);XS(a)
- Threat
- R1(G)
- Vars
- P(b);OGATEB,XB(C)::QAB(B)
- P(f);N_SPINQ(e),OGATEB::QAB(B),XP(h)
- S(c);N_GUARD::B(C)
- Refutation
- S(c);
- Try
- B(E);
- Threat
- DUALS(7)
- Vars
- S(a);N_GUARD::R1(G)
- Refutation
- S(c);
- Try
- B(E);
- Threat
- S(I)
- Vars
- P(b);OGATEB::QAB(B)
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- Refutation
- S(c);
- Try
- B(E);
- Threat
- DUALS(7)
- Vars
- S(a);N_GUARD::R1(G)
- Refutation
- S(c);
- Try
- B(E);
- Threat
- S(I)
- Vars
- S(a);N_GUARD,XB(E)::R1(G)
- P(b);OGATEB::QAB(B)
- S(a);N_GUARD::R1(G),XS(a)
- Refutation
- S(c);
- Try
- B(E);
- Threat
- DUALS(7)
- Vars
- S(a);N_GUARD,XB(E)::R1(G)
- Refutation
- S(c);
- Try
- B(E);
- Threat
- S(I)
- Vars
- S(a);OGATE,XB(E)::R1(G),XS(a)
- P(b);OGATEB::QAB(B)
- S(c);N_GUARD::P(A)
- Refutation
- P(g);XB(C)
- Try
- B(E);N_PINQ(e)
- Threat
- S(I)
- Vars
- Q(e);CHECK::R(K)+S(H)
- Q(e);XP(F)::R(K)+S(H),DCHECK,XQ(e)
- S(a);N_GUARD,XB(E)::R1(G)
- P(b);OGATEB::QAB(B)
- S(c);N_GUARD::P(A)
- Refutation
- Q(e);
- Try
- Q(B);CHECK,XQ(e)
- Refutation
- P(f);P_SPINP(f)
- Try
- Actual
- S(H);N_PINQ(e)
- Threat
- S(I)
- Vars
- Q(e);CHECK::R(K)+B(E)
- Q(e);XP(F)::R(K)+B(E)
- P(b);OGATEB::QAB(B)
- Q(e);::R(K)+B(E),XQ(e)
- S(c);N_GUARD::B(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).