MESON Chess Problem Database
Problem Display
PID: 27227 (7R/B7/8/5N2/8/K5QN/6nb/7k w - - 0 1)
Lebeck, Donald
Mate in Two!! (Lebeck), 1992
#2
6 + 3
SOLUTION
- SOUND
- Sets
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- Tries
- 1.Ka2?
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Bxg3!
- 1...Bg1
- 1.Kb2?
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Bxg3!
- 1...Bg1
- 1.Kb3?
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Bxg3!
- 1...Bg1
- 1.Ka4?
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Bxg3!
- 1...Bg1
- 1.Kb4?
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Bxg3!
- 1...Bg1
- 1.Sf4?
- threat
- 2.Rxh2#
- 2.Qxh2#
- 2.Qxg2#
- 1...Sxf4
- 2.Rxh2#
- 2.Qxh2#
- 2.Qg1#
- 1...Se1
- 2.Rxh2#
- 2.Qxe1#
- 2.Qxh2#
- 2.Qg1#
- 1...Se3
- 2.Rxh2#
- 2.Qxh2#
- 1...Sh4!
- threat
- 1.Se3?
- threat
- 2.Qxg2#
- 1...Sxe3
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- threat
- 1.Sd4?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Sh4?
- threat
- 2.Qxg2#
- 1...Sxh4
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- threat
- 1.Sd6?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Se7?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Sg7?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Be3?
- 1...Sxe3
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sxe3
- 1.Bd4?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Bc5?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Bb6?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Bb8?
- threat
- 2.Qxh2#
- 1...Bg1
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- threat
- 1.Rh4?
- 1...Sxh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sxh4
- 1.Rh5?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Rh6?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Rh7?
- 1...Sh4
- 2.Sf2#
- 1...Bg1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Bxg3!
- 1...Sh4
- 1.Rg8?
- threat
- 2.Qxg2#
- 1...Se1
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Sf4
- 2.Sf2#
- 1...Sh4
- 2.Sf2#
- 1...Bxg3!
- threat
- 1.Qe1+?
- 1...Bg1
- 2.Sf2#
- 2.Qxg1#
- 1...Sxe1!
- 1...Bg1
- 1.Ka2?
- Keys
- 1.Bg1!
- threat
- 2.Qxh2#
- 1...Bxg1
- 2.Sf2#
- 1...Bxg3
- 2.Sxg3#
- threat
- 1.Bg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- B(c);SBLOCK::R(F)+S(C),DCHECK
- S(b);::S(C)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- B(c);SBLOCK::R(F)+S(C),DCHECK
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- K(A);S_FLIGHT
- Vars
- B(c);SBLOCK::R(F)+S(C),DCHECK
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- K(A);P-FLIGHT
- Vars
- B(c);SBLOCK::R(F)+S(C),DCHECK
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- K(A);P-FLIGHT
- Vars
- B(c);SBLOCK::R(F)+S(C),DCHECK
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- K(A);S_FLIGHT
- Vars
- B(c);SBLOCK::R(F)+S(C),DCHECK
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- S(C);P_PINB(c)
- Threat
- DUALS(3)
- Refutation
- S(b);N_SPINB(c)
- Try
- S(D);
- Threat
- QAB1(B),XS(b)
- Vars
- S(b);XS(D)::S(C)
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- S(D);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- S(D);
- Threat
- QAB1(B),XS(b)
- Vars
- S(b);XS(D)::S(C)
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- S(D);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- S(D);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- S(D);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- B(E);
- Vars
- S(b);XB(E)::S(C)
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- B(E);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- B(E);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- B(E);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- B(E);
- Threat
- QAR1(B),XB(c)
- Vars
- B(c);SBLOCK::R(F)+S(C),DCHECK
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- R(F);
- Vars
- S(b);XR(F)::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- R(F);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- R(F);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- R(F);
- Vars
- S(b);::S(C)
- B(c);SBLOCK::R(F)+S(C),DCHECK
- Refutation
- B(c);XQ(B)
- Try
- R(F);
- Threat
- QAB1(B),XS(b)
- Vars
- S(b);::S(C)
- Refutation
- B(c);XQ(B)
- Try
- Q(B);CHECK
- Refutation
- S(b);XQ(B)
- Try
- Actual
- B(E);
- Threat
- QAR1(B),XB(c)
- Vars
- B(c);SBLOCK,XB(E)::R(F)+S(C),DCHECK
- B(c);XQ(B)::S(D),XB(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).