MESON Chess Problem Database
Problem Display
PID: 27313 (8/8/8/1Q6/K7/8/3RpBp1/5kn1 w - - 0 1)
Lebeck, Donald
Mate in Two!! (Lebeck), 1992
#2
4 + 4
SOLUTION
- SOUND
- Sets
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Sf3
- Tries
- 1.Ka3?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Kb3?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Kb4?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Ka5?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Bxg1?
- threat
- 2.Rd1#
- 1...Ke1
- 2.Qxe2#
- 1...Kxg1!
- threat
- 1.Bd4?
- threat
- 2.Rd1#
- 1...Sf3
- 2.Qxe2#
- 1...Ke1!
- threat
- 1.Bc5?
- threat
- 2.Rd1#
- 1...Sf3
- 2.Qxe2#
- 1...Ke1!
- threat
- 1.Bb6?
- threat
- 2.Rd1#
- 1...Sf3
- 2.Qxe2#
- 1...Ke1!
- threat
- 1.Ba7?
- threat
- 2.Rd1#
- 1...Sf3
- 2.Qxe2#
- 1...Ke1!
- threat
- 1.Ra2?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Rb2?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Rc2?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Rxe2?
- 1...Sf3
- 2.Ra2#
- 2.Rb2#
- 2.Rc2#
- 2.Rd2#
- 1...Sh3
- 2.Ra2#
- 2.Rb2#
- 2.Rc2#
- 2.Rd2#
- 1...Sxe2!
- 1...Sf3
- 1.Qd3?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Qc4?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Qa6?
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...Sf3
- 1.Qe8?
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...e1Q
- 1.Qb1+?
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Kxf2!
- 1...e1Q
- 1.Qe5?
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Kxf2!
- 1...e1Q
- 1.Ka3?
- Keys
- 1.Be3!
- threat
- 2.Rd1#
- 1...Ke1
- 2.Qb1#
- 1...Sf3
- 2.Qxe2#
- threat
- 1.Be3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- S(b);N_GUARD::QAB1(D),XP(c)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- K(C);S_FLIGHT
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- K(C);P-FLIGHT
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- K(C);P-FLIGHT
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- B(B);XS(b)
- Threat
- R(A)
- Vars
- K(a);N_SPINP(c),P-FLIGHT::QAR1(D),XP(c)
- Refutation
- K(a);N_SPINP(c),P-FLIGHT,XB(B)
- Try
- B(B);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);N_SPINP(c),P-FLIGHT
- Try
- B(B);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);N_SPINP(c),P-FLIGHT
- Try
- B(B);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);N_SPINP(c),P-FLIGHT
- Try
- B(B);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);N_SPINP(c),P-FLIGHT
- Try
- R(A);
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- R(A);
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- R(A);
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- R(A);XP(c)
- Refutation
- S(b);P_SPINS(b),XR(A)
- Try
- Q(D);
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- Q(D);
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- Q(D);
- Vars
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,XB(B)
- Try
- Q(D);N_PINP(c)
- Vars
- P(c);OGATE::QAR1(D),XQ(c)
- P(c);OGATE::QAR1(D),XS(c)
- P(c);OGATE::QAR1(D),XB(c)
- P(c);OGATE::QAR1(D),XR(c)
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,P_SPINP(c),XB(B)
- Try
- Q(D);CHECK,N_PINP(c)
- Vars
- P(c);P_SPINQ(c)::QAR1(D),XQ(c)
- P(c);P_SPINS(c)::QAR1(D),XS(c)
- P(c);P_SPINB(c)::QAR1(D),XB(c)
- P(c);P_SPINR(c)::QAR1(D),XR(c)
- Refutation
- K(a);P-FLIGHT,P_SPINP(c),XB(B)
- Try
- Q(D);N_PINP(c)
- Vars
- P(c);OGATE::QAR1(D),XQ(c)
- P(c);OGATE::QAR1(D),XS(c)
- P(c);OGATE::QAR1(D),XB(c)
- P(c);OGATE::QAR1(D),XR(c)
- S(b);N_GUARD::QAB1(D),XP(c)
- Refutation
- K(a);P-FLIGHT,P_SPINP(c),XB(B)
- Try
- Actual
- B(B);
- Threat
- R(A)
- Vars
- K(a);N_SPINP(c),P-FLIGHT::QAR(D)
- S(b);N_GUARD::QAB1(D),XP(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).