MESON Chess Problem Database
Problem Display
PID: 94799 (8/8/8/N1B5/b3B3/1rP5/kPQ5/rN5K w - - 0 1)
Andrade, Barry Jack da Costa
British Chess Magazine, 1952
#2
8 + 4
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bb5
- 2.Qxb3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxb1+
- Tries
- 1.Kg1?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bb5
- 2.Qxb3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Kg2?
- 1...Rxb1
- 2.Qxb1#
- 1...Rxc3
- 2.Sxc3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bb5
- 2.Qxb3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxb2!
- 1...Rxb1
- 1.Kh2?
- 1...Rxb1
- 2.Qxb1#
- 1...Rxc3
- 2.Sxc3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bb5
- 2.Qxb3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxb2!
- 1...Rxb1
- 1.Bf2?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Ba3?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxb2#
- 1...Rxa3
- 2.b3#
- 1...Bb5
- 2.Qxb3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Be3?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Bb4?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Rxb4
- 2.b3#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Bd4?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Bb6?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Rxb6
- 2.b3#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Bd6?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Ba7?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Be7?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Bf8?
- 1...Rxb1+
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxc3!
- 1...Rxb1+
- 1.Kg1?
- Keys
- 1.Bg1!
- 1...Rxb1
- 2.Qxb1#
- 1...Rxb2
- 2.Qxa4#
- 1...Rxc3
- 2.Sxc3#
- 1...Bb5
- 2.Qxb3#
- 1...Ra3
- 2.b3#
- 1...Rb4
- 2.b3#
- 1...Rb5
- 2.b3#
- 1...Rb6
- 2.b3#
- 1...Rb7
- 2.b3#
- 1...Rb8
- 2.b3#
- 1...Bc6
- 2.Qxb3#
- 1...Bd7
- 2.Qxb3#
- 1...Be8
- 2.Qxb3#
- 1...Rxb1
- 1.Bg1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD::QAB1(D),XR(c)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- K(B);N_SPINS(A),S_FLIGHT
- Vars
- R(a);OGATE,XS(A)::QAB1(D),XR(a)
- R(c);XP(E)::S(A),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD::QAB1(D),XR(c)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);P_PINQ(D),P_SPINR(c),XP(C)
- Try
- K(B);N_SPINS(A),P-FLIGHT
- Vars
- R(a);OGATE,XS(A)::QAB1(D),XR(a)
- R(c);XP(E)::S(A),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD::QAB1(D),XR(c)
- Refutation
- R(c);P_PINQ(D),P_SPINR(c),XP(C)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),XP(C)::QAR1(D),XR(c)
- R(c);OGATE,XB(H)::QAR(D)+P(C)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- R(c);OGATE,XB(H)::QAR(D)+P(C)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- R(c);OGATE,XB(H)::QAR(D)+P(C)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- B(H);
- Vars
- R(a);CHECK,OGATE,XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(c)
- Refutation
- R(c);XP(E)
- Try
- Actual
- B(H);N_SPINS(A)
- Vars
- R(a);OGATE,P_PINB(H),XS(A)::QAB1(D),XR(a)
- R(c);OGATE,P_SPINR(c),SBLOCK,XP(C)::QAR2(D),XB(d)
- R(c);XP(E)::S(A),XR(c)
- B(d);N_GUARD::QAB1(D),XR(c)
- R(c);OGATE::QAR(D)+P(C)
- B(d);N_GUARD,P_PINB(F)::QAB1(D),XR(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).