MESON Chess Problem Database
Problem Display
PID: 72678 (8/2n5/2pp2p1/KpkpR1Q1/1npb1N2/2R5/8/6B1 w - - 0 1)
Backe, Espen
Backe, Odd Erik
Die Schwalbe, 1986
#2
6 + 10
SOLUTION
- SOUND
- Sets
- 1...Bxg1
- 2.Qxg1#
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...Sa2
- 2.Sd3#
- 1...Sc2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...dxe5
- 2.Qe7#
- 1...Bxg1
- Tries
- 1.Bf2?
- 1...dxe5
- 2.Qe7#
- 1...Be3
- 2.Bxe3#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...Bxf2!
- 1...dxe5
- 1.Be3?
- 1...dxe5
- 2.Qe7#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...Bxe3!
- 1...dxe5
- 1.Rc1?
- 1...Bxg1
- 2.Qxg1#
- 1...dxe5
- 2.Qe7#
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...c3
- 2.Rxc3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...Sc2!
- 1...Bxg1
- 1.Rc2?
- 1...Bxg1
- 2.Qxg1#
- 1...dxe5
- 2.Qe7#
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...c3
- 2.Rxc3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...Sxc2!
- 1...Bxg1
- 1.Re1?
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...Bxg1!
- 1...Bf2
- 1.Re2?
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...Bxg1!
- 1...Bf2
- 1.Re4?
- threat
- 2.Bxd4#
- 1...Sc2
- 2.Sd3#
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...Se6
- 2.Sxe6#
- 1...Bxg1!
- threat
- 1.Rxd5+?
- 1...Sbxd5
- 2.Sd3#
- 1...Scxd5
- 2.Se6#
- 1...cxd5!
- 1...Sbxd5
- 1.Rf5?
- 1...Bxg1
- 2.Qxg1#
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...gxf5!
- 1...Bxg1
- 1.Re7?
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...Bxg1!
- 1...Bf2
- 1.Re8?
- 1...Sxe8
- 2.Se6#
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Bxg1!
- 1...Sxe8
- 1.Qxg6?
- 1...Bxg1
- 2.Qxg1#
- 1...Bf2
- 2.Bxf2#
- 1...Be3
- 2.Bxe3#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...dxe5!
- 1...Bxg1
- 1.Bf2?
- Keys
- 1.Ree3!
- 1...Bxc3
- 2.Rxc3#
- 1...Bxe3
- 2.Bxe3#
- 1...Be5
- 2.Rxe5#
- 1...Bf6
- 2.Re5#
- 1...Bg7
- 2.Re5#
- 1...Bh8
- 2.Re5#
- 1...Sc2
- 2.Sd3#
- 1...Sa2
- 2.Sd3#
- 1...Sd3
- 2.Sxd3#
- 1...Sba6
- 2.Sd3#
- 1...Sca6
- 2.Se6#
- 1...Se6
- 2.Sxe6#
- 1...Sa8
- 2.Se6#
- 1...Se8
- 2.Se6#
- 1...Bxc3
- 1.Ree3!
This is a version
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- B(c);N_SPINB(c),OGATE,XB(A)::QAB(F),XB(c)
- B(c);OGATEB::B(A),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- P(h);OGATEB,XR(E)::QAB(F)
- Tries
- Try
- B(A);
- Vars
- P(h);OGATEB,XR(E)::QAB(F)
- B(c);OGATEB::B(A),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- B(c);N_SPINB(c),XB(A)
- Try
- B(A);
- Vars
- P(h);OGATEB,XR(E)::QAB(F)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- B(c);N_SPINB(c),XB(A)
- Try
- R(B);
- Vars
- B(c);N_SPINB(c),OGATE,XB(A)::QAB(F),XB(c)
- P(h);OGATEB,XR(E)::QAB(F)
- B(c);OGATEB::B(A),XB(c)
- P(b);OGATEB::R(B),XP(b)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- S(a);N_SPINP(b),P_SPINP(f)
- Try
- R(B);
- Vars
- B(c);N_SPINB(c),OGATE,XB(A)::QAB(F),XB(c)
- P(h);OGATEB,XR(E)::QAB(F)
- B(c);OGATEB::B(A),XB(c)
- P(b);OGATEB::R(B),XP(b)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- S(a);N_SPINP(b),P_SPINP(f),XR(B)
- Try
- R(E);
- Vars
- B(c);OGATEB::B(A),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- B(c);N_SPINB(c),XB(A)
- Try
- R(E);
- Vars
- B(c);OGATEB::B(A),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- B(c);N_SPINB(c),XB(A)
- Try
- R(E);
- Threat
- B(A),XB(c)
- Vars
- S(a);N_GUARD::S(C)
- B(c);OGATEB::B(A),XB(c)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- B(c);N_SPINB(c),XB(A)
- Try
- R(E);CHECK,XP(f)
- Vars
- S(a);P_SPINS(a),XR(E)::S(C)
- S(j);P_SPINS(j),XR(E)::S(C)
- Refutation
- P(g);XR(E)
- Try
- R(E);
- Vars
- B(c);N_SPINB(c),OGATE,XB(A)::QAB(F),XB(c)
- B(c);OGATEB::B(A),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- P(i);XR(E)
- Try
- R(E);
- Vars
- B(c);OGATEB::B(A),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- B(c);N_SPINB(c),XB(A)
- Try
- R(E);
- Vars
- S(j);N_GUARD,XR(E)::S(C)
- B(c);OGATEB::B(A),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- B(c);N_SPINB(c),XB(A)
- Try
- Q(F);XP(i)
- Vars
- B(c);N_SPINB(c),OGATE,XB(A)::QAB(F),XB(c)
- B(c);OGATEB::B(A),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(j)
- Refutation
- P(h);XR(E)
- Try
- Actual
- R(E);N_PINB(c)
- Vars
- B(c);N_SPINP(b),OGATE,P_SPINP(f),XR(B)::B(A)+R(E),XB(c)
- B(c);OGATE,P_SPINB(c),XR(E)::B(A),XB(c)
- B(c);OGATEB::B(A)+R(E),XB(c)
- B(c);OGATEB::B(A)+R(E)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(j);N_GUARD::S(C)
- S(j);N_GUARD::S(C),XS(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).