MESON Chess Problem Database
Problem Display
PID: 199563 (6bK/8/5Q1B/3R2r1/R1B1k1Pp/4bN1P/2Pq1r2/5N2 w - - 0 1)
Dutt, TL
The Observer, 1945
(First published on Sun Nov 11 1945)
#2
11 + 7
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qd3
- 2.cxd3#
- 1...Qxd5
- 2.Bd3#
- 1...Rxg4
- 2.Re5#
- 2.Qf5#
- 1...Rxd5
- 2.Bd3#
- 1...Re5
- 2.Rxe5#
- 1...Rf5
- 2.Qxf5#
- 1...Rg6
- 2.Re5#
- 2.Qf5#
- 1...Rg7
- 2.Re5#
- 2.Qf5#
- 1...Bxd5
- 2.Bd3#
- 1...Qd3
- Tries
- 1.S3xd2+?
- 1...Bxd2
- 2.Rd4#
- 1...Rxd2!
- 1...Bxd2
- 1.Rd3?
- threat
- 2.Bd5#
- 1...Qxc2
- 2.Rxe3#
- 1...Qxd3
- 2.cxd3#
- 1...Qb4
- 2.Rxe3#
- 1...Rd5
- 2.Bxd5#
- 1...Bd4
- 2.Qxd4#
- 1...Bd5
- 2.Bxd5#
- 1...Bxc4!
- threat
- 1.Rf5?
- threat
- 2.Bd3#
- 2.Bd5#
- 2.Qe5#
- 1...Qxc2
- 2.Qe5#
- 1...Rxf5
- 2.Qxf5#
- 1...Bxc4
- 2.Qe5#
- 2.Qe7#
- 2.Qe6#
- 1...Bf4
- 2.Bd5#
- 1...Qb4
- 2.Bd3#
- 2.Qe5#
- 1...Qc3
- 2.Bd3#
- 2.Bd5#
- 1...Qa5
- 2.Bd3#
- 2.Bd5#
- 1...Qd3
- 2.Bxd3#
- 2.Bd5#
- 2.Qe5#
- 2.cxd3#
- 1...Qd4
- 2.Bd3#
- 1...Qd5
- 2.Bd3#
- 2.Bxd5#
- 1...Qd6
- 2.Bd3#
- 2.Bd5#
- 1...Bd5
- 2.Bd3#
- 2.Bxd5#
- 2.Qe5#
- 1...Bd4!
- threat
- 1.Rxg5?
- threat
- 2.Bd3#
- 2.Bd5#
- 2.Re5#
- 2.Qf5#
- 1...Qxc2
- 2.Re5#
- 2.Qf5#
- 1...Rxf3
- 2.Bd3#
- 2.Bd5#
- 2.Qe5#
- 1...Bxg5
- 2.Qf5#
- 1...Bxc4
- 2.Re5#
- 2.Qf5#
- 1...Bf4
- 2.Bd5#
- 1...Qb4
- 2.Bd3#
- 2.Re5#
- 2.Qf5#
- 1...Qc3
- 2.Bd3#
- 2.Bd5#
- 1...Qa5
- 2.Bd3#
- 2.Bd5#
- 1...Qd3
- 2.Bxd3#
- 2.Bd5#
- 2.Re5#
- 2.Qf5#
- 2.cxd3#
- 1...Qd4
- 2.Bd3#
- 1...Qd5
- 2.Bd3#
- 2.Bxd5#
- 1...Qd6
- 2.Bd3#
- 2.Bd5#
- 2.Qf5#
- 1...Qd7
- 2.Bd3#
- 2.Bd5#
- 2.Re5#
- 1...Bd5
- 2.Bd3#
- 2.Bxd5#
- 2.Re5#
- 2.Qf5#
- 1...Be6
- 2.Bd3#
- 2.Bd5#
- 2.Re5#
- 1...Bh7
- 2.Bd3#
- 2.Bd5#
- 2.Re5#
- 1...Bd4!
- threat
- 1.S3xd2+?
- Keys
- 1.Qc6!
- threat
- 2.Rd4#
- 1...Qd4+
- 2.Rxd4#
- 1...Bd4+
- 2.Rxd4#
- 1...Kxf3
- 2.Rf5#
- 1...Kf4
- 2.Rf5#
- 1...Qxd5
- 2.Bxd5#
- 1...Rxf3
- 2.Bd3#
- 1...Rxg4
- 2.Re5#
- 1...Rxd5
- 2.Bxd5#
- 1...Bxd5
- 2.Bxd5#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 6
- REMOVED MATES = 3
- Sets
- Q(a);OGATE::P(B),XQ(a)
- Q(a);SBLOCK,XR(H)::R(E)+B(F),DCHECK
- R(f);SBLOCK,XR(H)::R(E)+B(F),DCHECK
- R(f);N_GUARD::R1(H),XR(f)
- R(f);N_GUARD::QAB1(I),XR(f)
- B(g);SBLOCK,XR(H)::R(E)+B(F),DCHECK
- Tries
- Try
- S(C);CHECK,XQ(a)
- Vars
- B(c);XS(C)::R1(H)
- Refutation
- R(b);XS(C)
- Try
- R(H);
- Threat
- R(E)+B(F),DCHECK
- Vars
- Q(a);N_GUARD,XP(B)::R1(H),XB(c)
- Q(a);OGATE,XR(H)::P(B),XQ(a)
- Q(a);N_GUARD::R1(H),XB(c)
- R(f);::R(E)+B(F),DCHECK,XR(f)
- B(c);N_GUARD,P_PINQ(I)::QAR1(I),XB(c)
- B(g);::R(E)+B(F),DCHECK,XB(g)
- Refutation
- B(g);P_SPINB(g),XB(F)
- Try
- R(H);
- Threat
- DUALS(3)
- Vars
- Q(a);XP(B)::QAR1(I)
- R(f);OGATE,XR(H)::QAB1(I),XR(f)
- B(c);::R(E)+B(F),DCHECK
- Q(a);P_PINQ(I)::B(F)
- Refutation
- B(c);P_PINQ(I)
- Try
- R(H);XR(f)
- Threat
- DUALS(4)
- Vars
- B(c);XR(H)::QAB1(I)
- B(c);::R(E)+B(F),DCHECK
- Q(a);P_PINQ(I)::B(F)
- Refutation
- B(c);P_PINQ(I)
- Try
- Actual
- Q(I);
- Threat
- QAB(I)+R(H),DCHECK
- Vars
- Q(a);CHECK::QAB(I)+R(H),DCHECK,XQ(a)
- B(c);CHECK::QAB(I)+R(H),DCHECK,XB(c)
- K(d);S_FLIGHT,XS(C)::QAB(I)+R(H),DCHECK
- K(d);P-FLIGHT,P_SPINR(f)::R1(H)
- Q(a);OGATE,P_SPINQ(a),XR(H)::R(E)+B(F),DCHECK,XQ(a)
- R(b);SBLOCK,XS(C)::R(E)+B(F),DCHECK
- R(f);XP(G)::QAB(I)+R(H),DCHECK
- R(f);OGATE,P_SPINR(f),XR(H)::R(E)+B(F),DCHECK,XR(f)
- B(g);OGATE,P_SPINB(g),XR(H)::R(E)+B(F),DCHECK,XB(g)
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