MESON Chess Problem Database
Problem Display
PID: 230217 (Q1q5/2B5/p2R4/4kBRK/1n4pp/2N3P1/3n1r1N/3b1r2 w - - 0 1)
Burger, Robert Eugene
US Problem Bulletin, 1988
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxf5
- 2.Qe8#
- 2.Qh8#
- 1...Qb7
- 2.Qe8#
- 2.Qh8#
- 1...Qe8+
- 2.Qxe8#
- 1...Qh8+
- 2.Qxh8#
- 1...Re2
- 2.Sxg4#
- 1...Rf3
- 2.Sxg4#
- 1...Bc2
- 2.Sxg4#
- 1...Bb3
- 2.Sxg4#
- 1...Bf3
- 2.Bd7#
- 2.Bxc8#
- 1...Ba4
- 2.Sxg4#
- 1...Sb1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Sf3
- 2.Sxg4#
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa2
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sd3
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Qxf5
- Tries
- 1.Sf3+?
- 1...Bxf3
- 2.Bd7#
- 2.Bxc8#
- 1...Sxf3
- 2.Qe4#
- 1...gxf3
- 2.Bd7#
- 2.Bxc8#
- 1...Rxf3!
- 1...Bxf3
- 1.Se2?
- threat
- 2.Sxg4#
- 2.Re6#
- 1...Qe8+
- 2.Rdg6#
- 2.Qxe8#
- 1...Qh8+
- 2.Rh6#
- 2.Qxh8#
- 1...Qxf5
- 2.Sxg4#
- 2.Rxa6#
- 2.Rb6#
- 2.Rg6#
- 2.Rh6#
- 2.Qe8#
- 1...Qxc7
- 2.Re6#
- 1...Qxa8
- 2.Sxg4#
- 1...Rxe2
- 2.Sxg4#
- 1...Rxh2
- 2.Re6#
- 1...Rxf5
- 2.Sxg4#
- 1...Qe6
- 2.Sxg4#
- 2.Rxe6#
- 1...Qb7
- 2.Sxg4#
- 2.Qe8#
- 2.Qh8#
- 1...Rf4
- 2.Re6#
- 1...Sc6
- 2.Sxg4#
- 1...Bxe2!
- threat
- 1.Bb1+?
- 1...Qf5
- 2.Qe8#
- 2.Qh8#
- 1...Rf5!
- 1...Qf5
- 1.Bc2+?
- 1...Qf5
- 2.Qe8#
- 2.Qh8#
- 1...Rf5!
- 1...Qf5
- 1.Bd3+?
- 1...Qf5
- 2.Qe8#
- 2.Qh8#
- 1...Rf5!
- 1...Qf5
- 1.Be4+?
- 1...Qf5
- 2.Qe8#
- 2.Qh8#
- 1...Rf5!
- 1...Qf5
- 1.Bxg4+?
- 1...Qf5
- 2.Qe8#
- 2.Qh8#
- 1...Rf5!
- 1...Qf5
- 1.Bg6+?
- 1...Qf5
- 2.Qe8#
- 2.Qh8#
- 1...Rf5!
- 1...Qf5
- 1.Bh7+?
- 1...Qf5
- 2.Qe8#
- 2.Qh8#
- 1...Rf5!
- 1...Qf5
- 1.Rc6+?
- 1...Kd4
- 2.Qa7#
- 1...Qxc7!
- 1...Kd4
- 1.Rd7+?
- 1...Qxc7
- 2.Qh8#
- 1...Kf6!
- 1...Qxc7
- 1.Qf3?
- threat
- 2.Sxg4#
- 2.Be6#
- 2.Bd7#
- 2.Bxc8#
- 1...Qe8+
- 2.Bg6#
- 1...Qh8+
- 2.Bh7#
- 1...Qxf5
- 2.Sxg4#
- 2.Rxf5#
- 1...Rxh2
- 2.Be6#
- 2.Bd7#
- 2.Bxc8#
- 1...Rxf3
- 2.Sxg4#
- 1...Bxf3
- 2.Bd7#
- 2.Bxc8#
- 1...Sxf3
- 2.Sxg4#
- 1...gxf3
- 2.Sg4#
- 2.Bd7#
- 2.Bxc8#
- 1...Qe6
- 2.Sxg4#
- 2.Bxe6#
- 1...Sd5
- 2.Qxd5#
- 1...Qb7
- 2.Sxg4#
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.Be4#
- 2.Bxg4#
- 2.Be6#
- 2.Bg6#
- 2.Bd7#
- 2.Bh7#
- 2.Bc8#
- 1...Qd7
- 2.Sxg4#
- 2.Be6#
- 2.Bxd7#
- 1...Qa8
- 2.Sxg4#
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.Be4#
- 2.Bxg4#
- 2.Be6#
- 2.Bg6#
- 2.Bd7#
- 2.Bh7#
- 2.Bc8#
- 1...Qb8
- 2.Sxg4#
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.Be4#
- 2.Bxg4#
- 2.Be6#
- 2.Bg6#
- 2.Bd7#
- 2.Bh7#
- 2.Bc8#
- 1...Qd8
- 2.Sxg4#
- 1...Qf8
- 2.Sxg4#
- 1...Qg8
- 2.Sxg4#
- 2.Bg6#
- 1...Bc2
- 2.Sxg4#
- 1...Se4
- 2.Sxg4#
- 2.Qxe4#
- 1...Qxc7!
- threat
- 1.Sf3+?
- Keys
- 1.Qa7!
- threat
- 2.Re6#
- 2.Qd4#
- 1...Qe8+
- 2.Rdg6#
- 1...Qh8+
- 2.Rh6#
- 1...Qxf5
- 2.Rxa6#
- 2.Rc6#
- 2.Rg6#
- 2.Rh6#
- 2.Qd4#
- 1...Rxf5
- 2.Qd4#
- 1...Qe6
- 2.Rxe6#
- 2.Qd4#
- 1...Rf4
- 2.Re6#
- 1...Sb3
- 2.Re6#
- 2.Qe3#
- 1...Sf3
- 2.Sxg4#
- 2.Re6#
- 2.Qe3#
- 1...Sc2
- 2.Re6#
- 2.Qc5#
- 1...Sd5
- 2.Re6#
- 1...Sc6
- 2.Re6#
- 2.Qc5#
- threat
- 1.Qa7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 12
- Sets
- Q(j);CHECK,OGATE::QAR(I),XQ(j)
- Q(j);CHECK,OGATE::QAB(I),XQ(j)
- R(d);S_CUTB(a)::S(A),XP(f)
- B(a);N_GUARD::S(A),XP(f)
- S(c);N_GUARD::QAR1(I)
- S(c);N_GUARD::QAR1(I),XS(c)
- S(e);N_GUARD::QAR1(I)
- S(e);N_GUARD::QAR1(I),XS(e)
- Tries
- Try
- S(A);CHECK
- Vars
- S(c);XS(A)::QAR1(I)
- Refutation
- R(d);XS(A)
- Try
- S(B);
- Threat
- DUALS(2)
- Vars
- Q(j);XB(H)::R1(G)
- Q(j);XQ(I)::S(A),XP(f)
- R(d);XS(B)::S(A),XP(f)
- R(d);XS(A)::B(H)+R(G),DCHECK
- R(d);P_PINR(E),P_SPINR(d),XB(D)::S(A),XP(f)
- R(d);::B(H)+R(G),DCHECK
- S(e);::S(A),XP(f)
- Refutation
- B(a);XS(B)
- Try
- B(D);CHECK
- Refutation
- R(d);P_PINR(E),P_SPINR(d)
- Try
- B(D);CHECK
- Refutation
- R(d);P_PINR(E),P_SPINR(d)
- Try
- B(D);CHECK
- Refutation
- R(d);P_PINR(E),P_SPINR(d)
- Try
- B(D);CHECK
- Refutation
- R(d);P_PINR(E),P_SPINR(d)
- Try
- B(D);CHECK,P_SPINB(D),XP(f)
- Refutation
- R(d);P_PINR(E),P_SPINR(d)
- Try
- B(D);CHECK
- Refutation
- R(d);P_PINR(E),P_SPINR(d)
- Try
- B(D);CHECK
- Refutation
- R(d);P_PINR(E),P_SPINR(d)
- Try
- R(G);CHECK
- Vars
- K(h);S_FLIGHT::QAB(I)
- Refutation
- Q(j);XB(H)
- Try
- R(G);CHECK
- Vars
- Q(j);OGATE,XB(H)::QAB(I)
- Refutation
- K(h);S_FLIGHT
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- Q(j);CHECK,N_GUARD::R(E)+B(D)
- R(d);XQ(I)::S(A),XP(f)
- S(c);XQ(I)::S(A),XP(f)
- S(e);N_GUARD::QAR1(I),XS(e)
- Q(j);::S(A),XP(f)
- B(a);::S(A),XP(f)
- Refutation
- Q(j);XB(H)
- Try
- Actual
- Q(I);
- Threat
- DUALS(2)
- Vars
- Q(j);CHECK,N_GUARD::B(H)+R(G)
- R(d);P_PINR(E),P_SPINR(d),XB(D)::QAB1(I)
- R(d);::B(H)+R(G),DCHECK
- S(e);::B(H)+R(G),DCHECK
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).