MESON Chess Problem Database
Problem Display
PID: 229776 (4R3/5p1K/4b2B/r5R1/3pBk2/1p3N2/3NQ1Pn/7n w - - 0 1)
Burger, Robert Eugene
US Problem Bulletin, 1987
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Ra2
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Ra3
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Ra4
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Ra6
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Ra7
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Ra8
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Bd5
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Bf5+
- 2.Rg6#
- 1...Sf2
- 2.g3#
- 1...Sxf3
- 2.Qxf3#
- 1...f5
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Ra1
- Tries
- 1.Se1?
- threat
- 2.Sd3#
- 1...Bf5+
- 2.Rg6#
- 1...Bg4
- 2.Rxg4#
- 1...Sg4
- 2.Qf3#
- 1...Bc4
- 2.Rg4#
- 1...Sf2
- 2.g3#
- 1...d3
- 2.Sxd3#
- 1...Rxg5!
- threat
- 1.Bd5?
- threat
- 2.Qe4#
- 2.Qe5#
- 1...Bf5+
- 2.Rg6#
- 1...Rxd5
- 2.Qe4#
- 1...Bxd5
- 2.Qe5#
- 1...Sxf3
- 2.Qxf3#
- 2.Qe4#
- 1...Bg4
- 2.Qe5#
- 1...Sf2
- 2.Qe5#
- 2.g3#
- 1...Sg3
- 2.Qe5#
- 1...f5
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 2.Qe5#
- 1...f6
- 2.Qe4#
- 1...Sg4!
- threat
- 1.Bf5?
- threat
- 2.Qe4#
- 1...Bxf5+
- 2.Rg6#
- 1...Re5
- 2.Qxe5#
- 1...Bd5
- 2.Qe5#
- 1...Sf2
- 2.g3#
- 1...Sg3
- 2.Rh5#
- 1...Sg4!
- threat
- 1.Rxa5+?
- 1...Kg4
- 2.Rg8#
- 1...Kg3!
- 1...Kg4
- 1.Rb5+?
- 1...Kg4
- 2.Rg8#
- 1...Kg3!
- 1...Kg4
- 1.Rc5+?
- 1...Kg4
- 2.Rg8#
- 1...Kg3!
- 1...Kg4
- 1.Rd5+?
- 1...Kg4
- 2.Rg8#
- 1...Kg3!
- 1...Kg4
- 1.Re5+?
- 1...Kg4
- 2.Rg8#
- 1...Kg3!
- 1...Kg4
- 1.Rf5+?
- 1...Kg4
- 2.Rg8#
- 1...Kg3!
- 1...Kg4
- 1.Reg8?
- threat
- 2.Rg4#
- 2.Rxa5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 1...Bf5+
- 2.Rxf5#
- 2.R5g6#
- 1...Sxf3
- 2.Rf5#
- 2.Qxf3#
- 1...Bg4
- 2.Rxg4#
- 1...Sg4
- 2.Rxg4#
- 1...Ra1
- 2.Rg3#
- 2.Rg4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...Ra2
- 2.Rg3#
- 2.Rg4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...Ra3
- 2.Rg3#
- 2.Rg4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...Ra4
- 2.Rg3#
- 2.Rg4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...Rb5
- 2.Rg4#
- 2.Rxb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 1...Rc5
- 2.Rg4#
- 2.Rxc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 1...Rd5
- 2.Rg4#
- 2.Rxd5#
- 2.Re5#
- 2.Rf5#
- 1...Re5
- 2.Rg4#
- 2.Rxe5#
- 2.Rf5#
- 1...Rf5
- 2.Rg4#
- 2.Rxf5#
- 1...Ra6
- 2.Rg3#
- 2.Rg4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...Ra7
- 2.Rg3#
- 2.Rg4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...Ra8
- 2.Rg3#
- 2.Rg4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...Bd5
- 2.Rg3#
- 2.Rg4#
- 2.Rxd5#
- 2.Re5#
- 2.Rf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...f5
- 2.Rg3#
- 2.Rg4#
- 2.Rxf5#
- 2.Rh5#
- 2.R5g6#
- 2.R5g7#
- 1...Rxg5!
- threat
- 1.Se1?
- Keys
- 1.Se5!
- threat
- 2.Sd3#
- 1...Bf5+
- 2.Rg6#
- 1...Rxe5
- 2.Rg4#
- 1...Bg4
- 2.Rxg4#
- 1...Sg4
- 2.Qf3#
- 1...Bc4
- 2.Rg4#
- 2.Rg6#
- 2.Rg7#
- 2.Rgg8#
- 1...Sf2
- 2.g3#
- 1...d3
- 2.Sxd3#
- threat
- 1.Se5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- B(g);CHECK,S_CUTR(f)::B(G)+R(F)
- S(a);N_GUARD::P(C)
- S(b);OGATE,XS(D)::QAR1(B),XS(b)
- Tries
- Try
- S(D);
- Threat
- S(D)
- Vars
- B(g);CHECK,S_CUTR(f)::B(G)+R(F)
- B(g);::B(G)+R(F),DCHECK,XB(g)
- S(b);N_GUARD::QAR1(B)
- B(g);::B(G)+R(F),DCHECK
- S(a);N_GUARD::P(C)
- P(d);::S(D),XP(d)
- Refutation
- R(f);P_SPINR(f),XR(F)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- B(g);CHECK,SBLOCK::B(G)+R(F)
- R(f);XB(E)::QAR1(B)
- B(g);XB(E)::QAB1(B)
- B(g);::QAB1(B)
- S(a);::QAB1(B)
- P(h);::QAR1(B)
- Refutation
- S(b);
- Try
- B(E);
- Threat
- QAR1(B)
- Vars
- B(g);CHECK,SBLOCK,XB(E)::B(G)+R(F)
- R(f);N_GUARD::QAB1(B),XR(f)
- B(g);S_CUTR(f)::QAB1(B)
- S(a);N_GUARD::P(C)
- S(a);SBLOCK::B(G)+R(F)
- Refutation
- S(b);
- Try
- R(F);CHECK,XR(f)
- Vars
- K(e);P-FLIGHT::R(I)
- Refutation
- K(e);S_FLIGHT
- Try
- R(F);CHECK
- Vars
- K(e);P-FLIGHT::R(I)
- Refutation
- K(e);S_FLIGHT
- Try
- R(F);CHECK
- Vars
- K(e);P-FLIGHT::R(I)
- Refutation
- K(e);S_FLIGHT
- Try
- R(F);CHECK
- Vars
- K(e);P-FLIGHT::R(I)
- Refutation
- K(e);S_FLIGHT
- Try
- R(F);CHECK
- Vars
- K(e);P-FLIGHT::R(I)
- Refutation
- K(e);S_FLIGHT
- Try
- R(F);CHECK
- Vars
- K(e);P-FLIGHT::R(I)
- Refutation
- K(e);S_FLIGHT
- Try
- R(I);
- Threat
- DUALS(7)
- Vars
- B(g);::B(G)+R(F),DCHECK,XB(g)
- S(b);::B(G)+R(F),DCHECK,XS(b)
- Refutation
- R(f);P_SPINR(f),XR(F)
- Try
- Actual
- S(D);
- Threat
- S(D)
- Vars
- B(g);CHECK::B(G)+R(F)
- R(f);SBLOCK,XS(D)::B(G)+R(F),DCHECK
- B(g);::B(G)+R(F),DCHECK,XB(g)
- S(b);N_GUARD::QAR1(B)
- S(a);N_GUARD::P(C)
- P(d);::S(D),XP(d)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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