MESON Chess Problem Database
Problem Display
PID: 94554 (1nr5/pR1p1ppb/2kP4/r1NR1p2/4Q3/5B2/5B1b/2nK4 w - - 0 1)
Becker, Christopher Bennett
British Chess Magazine, 1978
#2
8 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Qxa4#
- 1...Bxd6
- 2.Rxf5#
- 1...Ra4
- Tries
- 1.Rd4+?
- 1...Kxc5
- 2.Rd2#
- 2.Rd3#
- 2.Qc2#
- 2.Qd5#
- 1...fxe4!
- 1...Kxc5
- 1.Re5+?
- 1...Kxd6
- 2.Qd5#
- 2.Qd4#
- 1...fxe4!
- 1...Kxd6
- 1.Qa4+?
- 1...Rb5
- 2.Rd2#
- 2.Rd3#
- 2.Qxb5#
- 1...Rxa4!
- 1...Rb5
- 1.Qd4?
- threat
- 2.Re5#
- 2.Rxf5#
- 1...Rxc5
- 2.Rxc5#
- 1...f4
- 2.Rf5#
- 1...Re8
- 2.Re5#
- 1...Be5
- 2.Rxe5#
- 1...Ra3!
- threat
- 1.Qf4?
- threat
- 2.Rd2#
- 2.Rd3#
- 2.Rxf5#
- 1...Rxc5
- 2.Rxc5#
- 1...Bxf4
- 2.Rd2#
- 2.Rd3#
- 1...Ra3
- 2.Rd3#
- 1...Ra4
- 2.Qxa4#
- 1...Sd3
- 2.Rxd3#
- 2.Rxf5#
- 1...Re8!
- threat
- 1.Qe5?
- threat
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 1...Rxc5
- 2.Rxc5#
- 1...Bxe5
- 2.Rd2#
- 2.Rd3#
- 1...Ra3
- 2.Rd3#
- 1...Ra4
- 2.Rd4#
- 1...Sd3
- 2.Rxd3#
- 2.Rd4#
- 1...f4!
- threat
- 1.Qe6?
- threat
- 2.Rd2#
- 2.Rd3#
- 2.Re5#
- 2.Rxf5#
- 1...Rxc5
- 2.Rxc5#
- 1...dxe6
- 2.Rd2#
- 2.Rd3#
- 1...fxe6
- 2.Rd2#
- 2.Rd3#
- 1...f4
- 2.Rf5#
- 1...Ra3
- 2.Rd3#
- 1...Be5
- 2.Rd2#
- 2.Rd3#
- 2.Rxe5#
- 1...Sd3
- 2.Rxd3#
- 2.Re5#
- 2.Rxf5#
- 1...Ra4!
- threat
- 1.Qe7?
- threat
- 2.Rd2#
- 2.Rd3#
- 2.Re5#
- 2.Rxf5#
- 1...Rxc5
- 2.Rxc5#
- 1...f4
- 2.Rf5#
- 1...Ra3
- 2.Rd3#
- 1...Be5
- 2.Rd2#
- 2.Rd3#
- 2.Rxe5#
- 1...Sd3
- 2.Rxd3#
- 2.Re5#
- 2.Rxf5#
- 1...Ra4!
- threat
- 1.Qe8?
- threat
- 2.Rd2#
- 2.Rd3#
- 2.Qxc8#
- 1...Rxc5
- 2.Qxc8#
- 1...Bxd6
- 2.Rd2#
- 2.Rd3#
- 2.Re5#
- 2.Rxf5#
- 1...f4
- 2.Qxc8#
- 1...Ra3
- 2.Rd3#
- 2.Qxc8#
- 1...Ra4
- 2.Qxc8#
- 1...Rc7
- 2.Rd2#
- 2.Rd3#
- 1...Rd8
- 2.Rd2#
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 2.Qxc8#
- 1...Sa6
- 2.Rd2#
- 2.Rd3#
- 2.Qxd7#
- 1...Rxe8!
- threat
- 1.Rd4+?
- Keys
- 1.Qd3!
- threat
- 2.Re5#
- 2.Rxf5#
- 1...Rxc5
- 2.Rxc5#
- 1...Sxd3
- 2.Rxd3#
- 1...f4
- 2.Rf5#
- 1...Ra4
- 2.Qb5#
- 1...Re8
- 2.Re5#
- 1...Be5
- 2.Rxe5#
- threat
- 1.Qd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- R(c);N_GUARD::QAB(D),XR(c)
- B(b);SBLOCK,XP(G)::QAB(D)+R(F),XP(d)
- Tries
- Try
- R(F);CHECK
- Refutation
- P(d);P_SPINP(d),XQ(D)
- Try
- R(F);CHECK
- Refutation
- P(d);P_SPINP(d),XQ(D)
- Try
- Q(D);CHECK
- Refutation
- R(c);XQ(D)
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,XS(E)::B(C)+R(F),DCHECK,XR(c)
- P(d);::B(C)+R(F)
- R(l);::B(C)+R(F)
- B(b);::B(C)+R(F),XB(b)
- Refutation
- R(c);
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- R(c);OGATE,XS(E)::B(C)+R(F),DCHECK,XR(c)
- R(c);::B(C)+R(F)
- R(c);N_GUARD::QAB(D),XR(c)
- Refutation
- R(l);
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- R(c);OGATE,XS(E)::B(C)+R(F),DCHECK,XR(c)
- R(c);::B(C)+R(F)
- Refutation
- P(d);
- Try
- Q(D);
- Threat
- DUALS(4)
- Vars
- R(c);OGATE,XS(E)::B(C)+R(F),DCHECK,XR(c)
- P(d);::B(C)+R(F)
- R(c);::B(C)+R(F)
- Refutation
- R(c);
- Try
- Q(D);
- Threat
- DUALS(4)
- Vars
- R(c);OGATE,XS(E)::B(C)+R(F),DCHECK,XR(c)
- P(d);::B(C)+R(F)
- R(c);::B(C)+R(F)
- Refutation
- R(c);
- Try
- Q(D);P_PINP(g)
- Threat
- DUALS(3)
- Vars
- R(c);XS(E)::QAR2(D),XR(l)
- P(d);::QAR2(D),XR(l)
- R(c);::QAR2(D),XR(l)
- Refutation
- R(l);N_SPINP(g),XQ(D)
- Try
- Actual
- Q(D);
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,XS(E)::B(C)+R(F),DCHECK,XR(c)
- S(a);OGATE,XQ(D)::B(C)+R(F),XS(a)
- P(d);::B(C)+R(F)
- R(c);N_GUARD::QAB1(D)
- R(l);::B(C)+R(F)
- B(b);::B(C)+R(F),XB(b)
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