MESON Chess Problem Database
Problem Display
PID: 109091 (b3BB2/8/pNR1R3/kr2Q1K1/5N2/8/8/8 w - - 0 1)
Alpi, A
2nd Prize, KeyStip 14. Ty., 1975
#2
8 + 4
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Rxe5+
- 2.Rxe5#
- 1...Rc5
- Tries
- 1.Kg4?
- threat
- 2.Qa1#
- 1...Rxe5
- 2.Rxe5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Bxc6!
- threat
- 1.Kh4?
- threat
- 2.Qa1#
- 1...Rxe5
- 2.Rxe5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Bxc6!
- threat
- 1.Kf6?
- threat
- 2.Qa1#
- 1...Rxe5
- 2.Rxe5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Bxc6!
- threat
- 1.Kg6?
- threat
- 2.Qa1#
- 1...Rxe5
- 2.Rxe5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Bxc6!
- threat
- 1.Kh6?
- threat
- 2.Qa1#
- 1...Rxe5
- 2.Rxe5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Bxc6!
- threat
- 1.Sd3?
- threat
- 2.Bb4#
- 1...Rxe5+
- 2.Rxe5#
- 1...Rc5
- 2.Rxc5#
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Bxc6!
- threat
- 1.Sbd5?
- threat
- 2.Rxa6#
- 2.Qa1#
- 1...Rxd5
- 2.Rxa6#
- 1...Bxc6
- 2.Qa1#
- 1...Rb1
- 2.Rxa6#
- 1...Rb2
- 2.Rxa6#
- 1...Rb3
- 2.Rxa6#
- 1...Rb4
- 2.Rxa6#
- 1...Rc5
- 2.Rxc5#
- 2.Rxa6#
- 1...Rb6
- 2.Sxb6#
- 1...Rb7
- 2.Sb6#
- 2.Rxa6#
- 1...Rb8
- 2.Sb6#
- 2.Rxa6#
- 1...Bb7
- 2.Qa1#
- 1...Ka4!
- threat
- 1.Rc5?
- threat
- 2.Qc3#
- 2.Qe1#
- 1...Kb4
- 2.Rxb5#
- 2.Qc3#
- 1...Rxc5
- 2.Qxc5#
- 1...Be4
- 2.Qc3#
- 1...Bc6!
- threat
- 1.Qxb5+?
- 1...Kxb5
- 2.Re5#
- 1...axb5!
- 1...Kxb5
- 1.Kg4?
- Keys
- 1.Sfd5!
- threat
- 2.Qa1#
- 1...Rxd5
- 2.Qxd5#
- 1...Rxb6
- 2.Sxb6#
- 1...Rb1
- 2.Sb4#
- 1...Rb2
- 2.Sb4#
- 1...Rb3
- 2.Sb4#
- 1...Rb4
- 2.Sxb4#
- 1...Rc5
- 2.Rxc5#
- threat
- 1.Sfd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- R(b);::QAR2(B),XR(b)
- R(b);::QAR(B),XR(b)
- R(b);CHECK,N_SPINR(b),OGATE,XQ(B)::R(F),XR(b)
- Tries
- Try
- K(C);N_SPINQ(B),P-FLIGHT
- Threat
- QAR(B)
- Vars
- R(b);N_SPINR(b),OGATE,XQ(B)::R(F),XR(b)
- R(b);OGATEB::QAR2(B),XR(b)
- R(b);OGATEB::QAR(B),XR(b)
- Refutation
- B(d);XR(E)
- Try
- K(C);N_SPINQ(B),S_FLIGHT
- Threat
- QAR(B)
- Vars
- R(b);N_SPINR(b),OGATE,XQ(B)::R(F),XR(b)
- R(b);OGATEB::QAR2(B),XR(b)
- R(b);OGATEB::QAR(B),XR(b)
- Refutation
- B(d);XR(E)
- Try
- K(C);N_SPINQ(B),S_FLIGHT
- Threat
- QAR(B)
- Vars
- R(b);N_SPINR(b),OGATE,XQ(B)::R(F),XR(b)
- R(b);OGATEB::QAR2(B),XR(b)
- R(b);OGATEB::QAR(B),XR(b)
- Refutation
- B(d);XR(E)
- Try
- K(C);N_SPINQ(B),P-FLIGHT
- Threat
- QAR(B)
- Vars
- R(b);N_SPINR(b),OGATE,XQ(B)::R(F),XR(b)
- R(b);OGATEB::QAR2(B),XR(b)
- R(b);OGATEB::QAR(B),XR(b)
- Refutation
- B(d);XR(E)
- Try
- K(C);N_SPINQ(B),S_FLIGHT
- Threat
- QAR(B)
- Vars
- R(b);N_SPINR(b),OGATE,XQ(B)::R(F),XR(b)
- R(b);OGATEB::QAR2(B),XR(b)
- R(b);OGATEB::QAR(B),XR(b)
- Refutation
- B(d);XR(E)
- Try
- S(A);
- Threat
- B(H)
- Vars
- R(b);CHECK,N_SPINR(b),OGATE,XQ(B)::R(F),XR(b)
- R(b);::QAR(B),XR(b)
- Refutation
- B(d);XR(E)
- Try
- S(D);N_PINR(b),N_SPINQ(B)
- Threat
- DUALS(2)
- Vars
- R(b);P_PINQ(B),P_SPINR(b),XS(D)::R1(E),XP(c)
- B(d);XR(E)::QAR(B)
- R(b);::R1(E),XP(c)
- R(b);::QAR(B)+S(D),XR(b)
- B(d);::QAR(B)
- Refutation
- K(a);P-FLIGHT
- Try
- R(E);N_SPINQ(B)
- Threat
- DUALS(2)
- Vars
- R(b);OGATE,P_PINQ(B),XR(E)::QAR2(B),XR(b)
- B(d);::QAB(B)
- Refutation
- B(d);
- Try
- Q(B);CHECK,N_SPINQ(B),XR(b)
- Vars
- K(a);P-FLIGHT,XQ(B)::R(F)
- Refutation
- P(c);XQ(B)
- Try
- Actual
- S(A);N_PINR(b),N_SPINQ(B)
- Threat
- QAR(B)
- Vars
- R(b);OGATE,P_PINQ(B),P_SPINR(b),XS(A)::QAR(B),XR(b)
- R(b);XS(D)::QAR(B)+S(A),XR(b)
- R(b);::QAR(B)+S(A)
- R(b);::QAR(B)+S(A),XR(b)
- R(b);OGATEB::R(E),XR(b)
Developed and maintained by Brian Stephenson.
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