MESON Chess Problem Database
Problem Display
PID: 188310 (2N1R3/p1p2p1b/5B1b/K2k4/BP3n1Q/8/1NPr4/2rR4 w - - 0 1)
Boorer, PA
The Observer, 1937
(First published on Sun Feb 21 1937)
#2
10 + 9
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.c4#
- 1...Rb1
- 2.c4#
- 1...Rcxd1
- 2.c4#
- 1...Rd4
- 2.Rxd4#
- 2.Re5#
- 1...Se2
- 2.Re5#
- 2.Qc4#
- 1...Sg2
- 2.Re5#
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 2.Qd4#
- 1...Sh3
- 2.Re5#
- 2.Qc4#
- 1...Sh5
- 2.Re5#
- 2.Qc4#
- 1...Se6
- 2.Qc4#
- 1...Sg6
- 2.Qh1#
- 2.Qc4#
- 2.Qe4#
- 1...c6
- 2.Bb3#
- 1...Ra1
- Tries
- 1.Bc3?
- threat
- 2.Re5#
- 2.Qd8#
- 1...Rd4
- 2.Rxd4#
- 2.Qd8#
- 1...Bg5
- 2.Re5#
- 1...Bg7
- 2.Qd8#
- 1...Bf8
- 2.Re5#
- 1...Bf5
- 2.Re5#
- 1...Sd3
- 2.Qd8#
- 2.Qc4#
- 2.Qd4#
- 1...Se6
- 2.Qc4#
- 1...Sg6
- 2.Qd8#
- 2.Qh1#
- 2.Qc4#
- 2.Qe4#
- 1...f6!
- threat
- 1.Rxd2+?
- 1...Sd3
- 2.Re5#
- 2.Qc4#
- 2.Qd4#
- 1...Bd3!
- 1...Sd3
- 1.Qe1?
- threat
- 2.Rd8#
- 2.Qe5#
- 1...Bf8
- 2.Qe5#
- 1...Be4
- 2.Qxe4#
- 1...Bf5
- 2.Qe5#
- 1...Sd3
- 2.Rd8#
- 1...Se6
- 2.Qe5#
- 1...Sg6
- 2.Rd8#
- 2.Qh1#
- 2.Qe4#
- 1...Se2!
- threat
- 1.Qf2?
- threat
- 2.Re5#
- 2.Qc5#
- 1...Rxc2
- 2.Re5#
- 1...Rd4
- 2.Rxd4#
- 2.Re5#
- 2.Qxd4#
- 1...Bf8
- 2.Re5#
- 1...Sd3
- 2.Qd4#
- 1...Sg6
- 2.Qc5#
- 2.Qg2#
- 2.Qf3#
- 1...c5
- 2.Re5#
- 2.Qxc5#
- 1...Se6!
- threat
- 1.Qg5+?
- 1...Bf5
- 2.Qxf5#
- 1...Bxg5!
- 1...Bf5
- 1.Qh1+?
- 1...Be4
- 2.Qxe4#
- 1...Sg2!
- 1...Be4
- 1.Qxf4?
- threat
- 2.Re5#
- 2.Qe5#
- 2.Qc4#
- 1...Rxc2
- 2.Re5#
- 2.Qe5#
- 1...Rd4
- 2.Rxd4#
- 2.Re5#
- 2.Qe5#
- 2.Qxd4#
- 1...Bd3
- 2.Re5#
- 2.Qe5#
- 2.Qd4#
- 1...Be4
- 2.Qe5#
- 2.Qxe4#
- 1...Bxf4!
- threat
- 1.Qg4?
- threat
- 2.Qd7#
- 1...Bf5
- 2.Qxf5#
- 1...Se6
- 2.Qc4#
- 1...Bf8!
- threat
- 1.c3?
- threat
- 2.Re5#
- 1...Sd3
- 2.Qc4#
- 2.Qd4#
- 1...Se6
- 2.Qc4#
- 1...Sg6
- 2.Qh1#
- 2.Qc4#
- 2.Qe4#
- 1...Rxc3!
- threat
- 1.Bc3?
- Keys
- 1.Sc4!
- threat
- 2.Se3#
- 1...Kxc4
- 2.Bb3#
- 1...Se2
- 2.Re5#
- 1...Sg2
- 2.Re5#
- 1...Sd3
- 2.Qd4#
- 1...Sh3
- 2.Re5#
- 1...Sh5
- 2.Re5#
- 1...Se6
- 2.Se7#
- 1...Sg6
- 2.Qe4#
- threat
- 1.Sc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 4
- Sets
- R(a);N_GUARD,P_PINB(D)::P(C)
- R(a);N_GUARD::P(C)
- R(a);N_GUARD,N_SPINR(b),XR(A)::P(C)
- S(c);OGATE::QAB1(F)
- P(g);SBLOCK::B(D)
- Tries
- Try
- B(H);
- Threat
- DUALS(2)
- Vars
- B(e);::R1(J)
- B(e);::QAR(F)
- B(i);::R1(J)
- S(c);OGATE::QAB1(F)
- Refutation
- P(h);
- Try
- R(A);CHECK,XR(b)
- Refutation
- B(i);P_SPINB(i)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- B(e);::QAR1(F)
- B(i);N_GUARD::QAB1(F),XB(i)
- B(i);::QAR1(F)
- S(c);N_SPINR(b)::R(J)
- S(c);::QAR1(F)
- Refutation
- S(c);
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- R(a);XP(C)::R1(J)
- B(e);::R1(J)
- S(c);N_SPINR(b),S_CUTR(b)::QAR1(F)
- Refutation
- S(c);
- Try
- Q(F);CHECK
- Vars
- B(i);N_GUARD,P_SPINB(i)::QAR2(F),XB(i)
- Refutation
- B(e);XQ(F)
- Try
- Q(F);CHECK
- Vars
- B(i);N_GUARD,P_SPINB(i)::QAB1(F),XB(i)
- Refutation
- S(c);P_SPINS(c)
- Try
- Q(F);XS(c)
- Threat
- DUALS(3)
- Refutation
- B(e);XQ(F)
- Try
- Q(F);
- Threat
- QAR2(F)
- Vars
- B(i);N_GUARD::QAR2(F),XB(i)
- S(c);OGATE::QAB1(F)
- Refutation
- B(e);
- Try
- P(C);
- Threat
- R1(J)
- Vars
- S(c);OGATE::QAB1(F)
- Refutation
- R(a);XP(C)
- Try
- Actual
- S(B);
- Threat
- S(B)
- Vars
- K(d);N_SPINR(b),OGATEB,P_SPINS(c),S_FLIGHT,XS(B)::B(D)
- S(c);::R1(J)
- S(c);N_SPINR(b),OGATE::QAR1(F)
- S(c);SBLOCK::S(I)
- S(c);OGATE::QAB1(F)
Developed and maintained by Brian Stephenson.
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