MESON Chess Problem Database
Problem Display
PID: 185182 (8/p2Q1N2/B4p2/3n1R2/1P2knp1/1K2p1P1/7N/6B1 w - - 0 1)
Lindsay, Ruth
The Observer, 1930
(First published on Sun Aug 17 1930)
#2
9 + 7
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.Rxf4#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sd3
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Se6
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sc3
- 2.Rxf4#
- 1...Sxb4
- 2.Rxf4#
- 1...Sb6
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Se7
- 2.Rxf4#
- 1...e2
- 2.Sd6#
- 1...Kd4
- Tries
- 1.Kb2?
- 1...Kd4
- 2.Rxf4#
- 1...Sxb4
- 2.Rxf4#
- 1...Se6
- 2.Qxd5#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sc3
- 2.Rxf4#
- 1...Sb6
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Se7
- 2.Rxf4#
- 1...e2
- 2.Sd6#
- 1...Sd3+!
- 1...Kd4
- 1.Kc2?
- 1...Kd4
- 2.Rxf4#
- 1...Se6
- 2.Qxd5#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sd3
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sc3
- 2.Rxf4#
- 1...Sb6
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Se7
- 2.Rxf4#
- 1...e2
- 2.Sd6#
- 1...Sxb4+!
- 1...Kd4
- 1.Ka3?
- 1...Sxb4
- 2.Rxf4#
- 1...Se6
- 2.Qxd5#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sd3
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sc3
- 2.Rxf4#
- 1...Sb6
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Se7
- 2.Rxf4#
- 1...e2
- 2.Sd6#
- 1...Kd4!
- 1...Sxb4
- 1.Bf2?
- 1...Kd4
- 2.Rxf4#
- 1...Sxb4
- 2.Rxf4#
- 1...Se6
- 2.Qxd5#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sd3
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sc3
- 2.Rxf4#
- 1...Sb6
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Se7
- 2.Rxf4#
- 1...e2
- 2.Sd6#
- 1...exf2!
- 1...Kd4
- 1.Rxd5?
- threat
- 2.Rd4#
- 2.Qf5#
- 1...Se2
- 2.Bd3#
- 2.Qf5#
- 2.Qe6#
- 1...Se6
- 2.Bd3#
- 2.Qxe6#
- 1...f5
- 2.Sg5#
- 2.Rd4#
- 2.Re5#
- 2.Qxf5#
- 1...Sxd5!
- threat
- 1.Re5+?
- 1...Kd4
- 2.Bxe3#
- 1...fxe5!
- 1...Kd4
- 1.Qb5?
- 1...Kd4
- 2.Qc4#
- 1...Sxb4
- 2.Rxf4#
- 1...Se2
- 2.Qd3#
- 2.Qxd5#
- 1...Sg2
- 2.Qd3#
- 2.Qxd5#
- 1...Sd3
- 2.Qxd3#
- 2.Qxd5#
- 1...Sh3
- 2.Qd3#
- 2.Qxd5#
- 1...Sh5
- 2.Qd3#
- 2.Qxd5#
- 1...Se6
- 2.Qd3#
- 2.Qxd5#
- 1...Sg6
- 2.Qd3#
- 2.Qxd5#
- 1...Sc3
- 2.Rxf4#
- 1...Sb6
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Se7
- 2.Rxf4#
- 1...e2
- 2.Sd6#
- 1...Kxf5!
- 1...Kd4
- 1.Qc6?
- threat
- 2.Rxf4#
- 1...Kd4
- 2.Qc4#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sd3
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Se6
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Kxf5!
- threat
- 1.Qd8?
- 1...Kd4
- 2.Rxf4#
- 1...Sxb4
- 2.Rxf4#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sd3
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Se6
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sc3
- 2.Rxf4#
- 1...Sb6
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Se7
- 2.Rxf4#
- 1...e2
- 2.Sd6#
- 1...Kxf5!
- 1...Kd4
- 1.Kb2?
- Keys
- 1.Sf1!
- 1...Kf3
- 2.Qxd5#
- 1...Kd4
- 2.Rxf4#
- 1...Sxb4
- 2.Rxf4#
- 1...Se2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sd3
- 2.Qxd5#
- 1...Sh3
- 2.Qxd5#
- 1...Sh5
- 2.Qxd5#
- 1...Se6
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sc3
- 2.Rxf4#
- 1...Sb6
- 2.Rxf4#
- 1...Sc7
- 2.Rxf4#
- 1...Se7
- 2.Rxf4#
- 1...e2
- 2.Sd2#
- 1...Kf3
- 1.Sf1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(b);P-FLIGHT,P_SPINP(a),P_SPINS(e)::R(F),XS(c)
- S(c);N_GUARD::QAB1(H),XS(e)
- S(e);N_GUARD::R1(F),XS(c)
- S(e);N_GUARD,XP(E)::R1(F),XS(c)
- P(a);::S(I)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- K(b);P-FLIGHT,P_SPINP(a),P_SPINS(e)::R(F),XS(c)
- S(e);N_GUARD,XP(E)::R1(F),XS(c)
- S(c);N_GUARD::QAB1(H),XS(e)
- S(e);N_GUARD::R1(F),XS(c)
- P(a);::S(I)
- Refutation
- S(c);CHECK
- Try
- K(C);S_FLIGHT
- Vars
- K(b);P-FLIGHT,P_SPINP(a),P_SPINS(e)::R(F),XS(c)
- S(c);N_GUARD::QAB1(H),XS(e)
- S(e);N_GUARD::R1(F),XS(c)
- P(a);::S(I)
- Refutation
- S(e);CHECK,XP(E)
- Try
- K(C);P-FLIGHT
- Vars
- S(e);N_GUARD,XP(E)::R1(F),XS(c)
- S(c);N_GUARD::QAB1(H),XS(e)
- S(e);N_GUARD::R1(F),XS(c)
- P(a);::S(I)
- Refutation
- K(b);P-FLIGHT,P_SPINP(a),P_SPINS(e)
- Try
- B(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(a),P_SPINS(e)::R(F),XS(c)
- S(e);N_GUARD,XP(E)::R1(F),XS(c)
- S(c);N_GUARD::QAB1(H),XS(e)
- S(e);N_GUARD::R1(F),XS(c)
- P(a);::S(I)
- Refutation
- P(a);XB(A)
- Try
- R(F);XS(e)
- Threat
- DUALS(2)
- Refutation
- S(c);XR(F)
- Try
- R(F);CHECK
- Vars
- K(b);P-FLIGHT,P_SPINP(a),P_SPINS(e)::B(A),XP(a)
- Refutation
- P(f);XR(F)
- Try
- Q(H);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::QAR1(H)
- S(e);N_GUARD,XP(E)::R1(F),XS(c)
- S(e);N_GUARD::R1(F),XS(c)
- P(a);::S(I)
- Refutation
- K(b);P_SPINS(e),S_FLIGHT,XR(F)
- Try
- Q(H);P_PINS(e)
- Threat
- R1(F),XS(c)
- Vars
- K(b);N_SPINS(e),P-FLIGHT,P_SPINP(a)::QAR1(H)
- S(c);N_GUARD::QAB1(H),XS(e)
- Refutation
- K(b);N_SPINS(e),S_FLIGHT,XR(F)
- Try
- Q(H);
- Vars
- K(b);P-FLIGHT,P_SPINP(a),P_SPINS(e)::R(F),XS(c)
- S(e);N_GUARD,XP(E)::R1(F),XS(c)
- S(c);N_GUARD::QAB1(H),XS(e)
- S(e);N_GUARD::R1(F),XS(c)
- P(a);::S(I)
- Refutation
- K(b);S_FLIGHT,XR(F)
- Try
- Actual
- S(B);
- Vars
- K(b);P_SPINS(c),S_FLIGHT::QAB(H),XS(e)
- K(b);P-FLIGHT,P_SPINP(a),P_SPINS(e)::R(F),XS(c)
- S(e);N_GUARD,XP(E)::R1(F),XS(c)
- S(c);N_GUARD::QAB1(H),XS(e)
- S(e);N_GUARD::R1(F),XS(c)
- P(a);N_GUARD::S(B)
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