MESON Chess Problem Database
Problem Display
PID: 161510 (1b3NK1/1p3n2/7p/1N4p1/r3k3/2Q2R2/2b2B2/2q1r2B w - - 0 1)
Chitsam, GH
The Observer, 1923
(First published on Sun May 13 1923)
#2
7 + 10
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Kd5
- 2.Rd3#
- 2.Rf5#
- 1...Ra1
- 2.Qd4#
- 1...Ra2
- 2.Qd4#
- 1...Ra3
- 2.Qd4#
- 1...Rd4
- 2.Qxd4#
- 1...Ra5
- 2.Qd4#
- 1...Ra6
- 2.Qd4#
- 1...Ra7
- 2.Qd4#
- 1...Ra8
- 2.Qd4#
- 1...Kd5
- Tries
- 1.Bg3?
- threat
- 2.Rf1#
- 2.Rf4#
- 1...Kd5
- 2.Rd3#
- 2.Rf5#
- 1...Bxg3
- 2.Rf1#
- 1...Qf4
- 2.Rxf4#
- 1...Bf4
- 2.Rxf4#
- 1...Qd2
- 2.Rf4#
- 1...Qe3
- 2.Rf4#
- 1...Qd1
- 2.Rf4#
- 1...Rf1
- 2.Rxf1#
- 2.Rf4#
- 1...Rg1
- 2.Rf4#
- 1...Re2
- 2.Rf4#
- 1...Re3
- 2.Rf4#
- 1...Rd4
- 2.Rf1#
- 2.Qxd4#
- 1...Bd1
- 2.Rf4#
- 2.Qd3#
- 1...Bd3
- 2.Qxd3#
- 1...Se5
- 2.Rf4#
- 1...Rxh1!
- threat
- 1.Rf5+?
- 1...Rxh1
- 2.Qf3#
- 1...Kxf5!
- 1...Rxh1
- 1.Qf6?
- threat
- 2.Sc3#
- 2.Re3#
- 2.Qf5#
- 1...Rxh1
- 2.Sc3#
- 2.Qf5#
- 1...Qe3
- 2.Rxe3#
- 2.Qf5#
- 1...Re3
- 2.Rxe3#
- 2.Qf5#
- 1...Qb2
- 2.Re3#
- 2.Qf5#
- 1...Qd2
- 2.Re3#
- 2.Qf5#
- 1...Qa3
- 2.Re3#
- 2.Qf5#
- 1...Qf4
- 2.Sc3#
- 2.Re3#
- 1...Qa1
- 2.Re3#
- 2.Qf5#
- 1...Ra3
- 2.Re3#
- 2.Qd4#
- 2.Qf5#
- 1...Rc4
- 2.Re3#
- 2.Qf5#
- 1...Bb1
- 2.Re3#
- 2.Qf5#
- 1...Bd1
- 2.Re3#
- 2.Qf5#
- 1...Bb3
- 2.Re3#
- 2.Qf5#
- 1...Bd3
- 2.Re3#
- 2.Rf4#
- 2.Qf5#
- 1...Bf4
- 2.Sc3#
- 2.Re3#
- 1...Be5
- 2.Re3#
- 1...Se5
- 2.Sc3#
- 2.Re3#
- 1...Sd6
- 2.Sc3#
- 2.Re3#
- 2.Qe6#
- 1...Kd5!
- threat
- 1.Qxc2+?
- 1...Kd5
- 2.Rf5#
- 1...Ke5
- 2.Rf5#
- 2.Qf5#
- 1...Qxc2!
- 1...Kd5
- 1.Qd3+?
- 1...Ke5
- 2.Rf5#
- 1...Bxd3!
- 1...Ke5
- 1.Qc4+?
- 1...Ke5
- 2.Sd7#
- 2.Qe6#
- 1...Rxc4!
- 1...Ke5
- 1.Qc5?
- threat
- 2.Sc3#
- 2.Qf5#
- 1...Rxh1
- 2.Qf5#
- 1...Qe3
- 2.Qf5#
- 1...Re3
- 2.Qf5#
- 1...Qb2
- 2.Qf5#
- 1...Qd2
- 2.Qf5#
- 1...Qa3
- 2.Qf5#
- 1...Qf4
- 2.Sc3#
- 2.Re3#
- 1...Qa1
- 2.Qf5#
- 1...Ra3
- 2.Qd4#
- 2.Qf5#
- 1...Rc4
- 2.Qf5#
- 1...Bb1
- 2.Qf5#
- 1...Bd1
- 2.Qf5#
- 1...Bb3
- 2.Qf5#
- 1...Bd3
- 2.Qf5#
- 1...Bf4
- 2.Sc3#
- 2.Re3#
- 1...Se5
- 2.Sc3#
- 1...Sd6
- 2.Sc3#
- 1...Be5!
- threat
- 1.Qc6+?
- 1...Ke5
- 2.Sd7#
- 2.Qe6#
- 1...bxc6!
- 1...Ke5
- 1.Bg3?
- Keys
- 1.Qc8!
- threat
- 2.Qf5#
- 1...Kd5
- 2.Rf5#
- 1...Ke5
- 2.Qe6#
- 1...Qf4
- 2.Re3#
- 1...Bf4
- 2.Re3#
- 1...Be5
- 2.Qxb7#
- 1...Se5
- 2.Sc3#
- 1...Sd6
- 2.Qe6#
- threat
- 1.Qc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 8
- Sets
- R(d);N_GUARD::QAR1(C)
- R(d);N_GUARD::QAR1(C),XR(d)
- Tries
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- B(j);XB(B)::B(A)+R(D)
- Q(a);::B(A)+R(D),DCHECK,XQ(a)
- B(j);::B(A)+R(D),DCHECK,XB(j)
- Q(a);::B(A)+R(D),DCHECK
- R(b);::B(A)+R(D),DCHECK
- B(c);N_GUARD::QAB1(C),XB(c)
- S(i);::B(A)+R(D),DCHECK
- Refutation
- R(b);XB(A)
- Try
- R(D);CHECK
- Vars
- R(b);XB(A)::QAB1(C)
- Refutation
- K(e);S_FLIGHT,XR(D)
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- B(j);::B(A)+R(D),DCHECK
- Refutation
- K(e);S_FLIGHT
- Try
- Q(C);CHECK,XB(c)
- Vars
- K(e);S_FLIGHT::B(A)+R(D),DCHECK
- Refutation
- Q(a);XQ(C)
- Try
- Q(C);CHECK
- Vars
- K(e);P-FLIGHT::R1(D)
- Refutation
- B(c);XQ(C)
- Try
- Q(C);CHECK
- Refutation
- R(d);XQ(C)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- R(b);XB(A)::QAB1(C)
- Q(a);::QAB1(C)
- R(b);::QAB1(C)
- R(d);::QAB1(C)
- B(c);::QAB1(C)
- S(i);::S(E)
- Refutation
- B(j);
- Try
- Q(C);CHECK
- Refutation
- P(h);XQ(C)
- Try
- Actual
- Q(C);
- Threat
- QAB1(C)
- Vars
- K(e);S_FLIGHT::B(A)+R(D),DCHECK
- K(e);P-FLIGHT::QAR1(C)
- Q(a);SBLOCK::B(A)+R(D),DCHECK
- B(j);SBLOCK::B(A)+R(D),DCHECK
- B(j);SBLOCK::QAB(C),XP(h)
- S(i);SBLOCK::S(E)
- S(i);N_GUARD,S_CUTB(j)::QAR2(C)
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