MESON Chess Problem Database
Problem Display
PID: 521 (2RN4/2bR1pB1/4rnP1/3p4/1P1kp1N1/3P4/2KQ4/3n4 w - - 0 1)
Clark, Cecil Henry Douglas
3rd Comm., The Observer, 1957
(First published on Sun Nov 3 1957)
#2
10 + 8
| 17397 | Ling Notebooks | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Sc6#
- 1...Rc6+
- 2.Sxc6#
- 1...Re7
- 2.Sc6#
- 1...Re8
- 2.Sc6#
- 1...Bh2
- 2.Rc4#
- 1...Bg3
- 2.Rc4#
- 1...Bf4
- 2.Rc4#
- 1...Ba5
- 2.Rc4#
- 1...Be5
- 2.Rc4#
- 1...Bb6
- 2.Rc4#
- 1...Bd6
- 2.Sc6#
- 1...Bb8
- 2.Rc4#
- 1...Bxd8
- 2.Rc4#
- 1...Sb2
- 2.Qc3#
- 2.Qe3#
- 1...Sf2
- 2.Qc3#
- 2.Qe3#
- 1...Sc3
- 2.Qxc3#
- 2.Qe3#
- 1...Se3+
- 2.Qxe3#
- 1...exd3+
- 2.Qxd3#
- 1...fxg6
- 2.Sxe6#
- 1...Re5
- Tries
- 1.Bxf6+?
- 1...Re5
- 2.Sc6#
- 1...Be5
- 2.Rc4#
- 1...Rxf6!
- 1...Re5
- 1.Rd6?
- threat
- 2.Sc6#
- 1...Se3+
- 2.Qxe3#
- 1...exd3+
- 2.Qxd3#
- 1...Bxd8
- 2.Rc4#
- 1...Rxd6!
- threat
- 1.Rcxc7?
- threat
- 2.Rc4#
- 1...Rc6+
- 2.Sxc6#
- 1...Se3+
- 2.Qxe3#
- 1...exd3+
- 2.Qxd3#
- 1...Sb2
- 2.Qc3#
- 2.Qe3#
- 1...Rd6!
- threat
- 1.Qg5?
- threat
- 2.Rxd5#
- 2.Qxd5#
- 1...Rc6+
- 2.Sxc6#
- 1...Se3+
- 2.Qxe3#
- 1...Re5
- 2.Sc6#
- 1...Rd6
- 2.Qe5#
- 1...Be5
- 2.Rc4#
- 1...Bd6
- 2.Sc6#
- 1...Sc3
- 2.Qe3#
- 1...exd3+!
- threat
- 1.Qxd1?
- threat
- 2.Qa1#
- 1...Rc6+
- 2.Sxc6#
- 1...exd3+
- 2.Qxd3#
- 1...Ra6!
- threat
- 1.Bxf6+?
- Keys
- 1.Qf4!
- 1...Rc6+
- 2.Sxc6#
- 1...Se3+
- 2.Qxe3#
- 1...Bxf4
- 2.Rc4#
- 1...Bxd8
- 2.Rc4#
- 1...fxg6
- 2.Sxe6#
- 1...Ra6
- 2.Qxe4#
- 1...Re5
- 2.Sc6#
- 1...Rb6
- 2.Qxe4#
- 1...Rd6
- 2.Qe5#
- 1...Re7
- 2.Sc6#
- 1...Re8
- 2.Sc6#
- 1...Ba5
- 2.Rc4#
- 1...Be5
- 2.Rc4#
- 1...Bb6
- 2.Rc4#
- 1...Bd6
- 2.Sc6#
- 1...Bb8
- 2.Rc4#
- 1...Sb2
- 2.Qe3#
- 1...Sf2
- 2.Qe3#
- 1...Sc3
- 2.Qe3#
- 1...Rc6+
- 1.Qf4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 3
- Sets
- R(e);N_GUARD,N_SPINS(f)::S(J)
- R(e);CHECK,N_GUARD::S(J),XR(e)
- R(e);N_GUARD::S(J)
- B(g);OGATE::R1(I)
- B(g);N_SPINS(f),OGATE::R1(I)
- B(g);N_SPINP(d),S_CUTR(e)::S(J)
- B(g);OGATE,XS(J)::R1(I)
- S(a);CHECK,N_GUARD::QAB1(B),XS(a)
- P(c);CHECK,N_SPINP(d),OGATE,P_SPINP(c),XP(C)::QAR1(B),XP(c)
- P(h);N_GUARD,XP(F)::S(J),XR(e)
- Tries
- Try
- B(H);CHECK,XS(f)
- Vars
- R(e);P_SPINR(e)::S(J)
- B(g);OGATE,P_SPINB(g)::R1(I)
- Refutation
- R(e);XB(H)
- Try
- R(G);
- Threat
- S(J)
- Vars
- S(a);CHECK,N_GUARD::QAB1(B),XS(a)
- P(c);CHECK,N_SPINP(d),OGATE,P_SPINP(c),XP(C)::QAR1(B),XP(c)
- B(g);OGATE,XS(J)::R1(I)
- Refutation
- R(e);N_SPINP(d),XR(G)
- Try
- R(I);XB(g)
- Threat
- R1(I)
- Vars
- R(e);CHECK,N_GUARD::S(J),XR(e)
- S(a);CHECK,N_GUARD::QAB1(B),XS(a)
- P(c);CHECK,N_SPINP(d),OGATE,P_SPINP(c),XP(C)::QAR1(B),XP(c)
- Refutation
- R(e);N_SPINP(d)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,N_GUARD::S(J),XR(e)
- S(a);CHECK,N_GUARD::QAB1(B),XS(a)
- R(e);N_GUARD,N_SPINS(f)::S(J)
- R(e);N_GUARD,N_SPINP(d),S_CUTB(g)::QAB1(B)
- B(g);N_SPINS(f),OGATE::R1(I)
- B(g);N_SPINP(d),S_CUTR(e)::S(J)
- S(a);N_GUARD::QAB1(B)
- Refutation
- P(c);CHECK,XP(C)
- Try
- Q(B);XS(a)
- Threat
- QAB(B)
- Vars
- R(e);CHECK,N_GUARD::S(J),XR(e)
- P(c);CHECK,N_SPINP(d),OGATE,P_SPINP(c),XP(C)::QAR1(B),XP(c)
- Refutation
- R(e);
- Try
- Actual
- Q(B);N_PINP(d),P_PINP(c)
- Vars
- R(e);CHECK,N_GUARD::S(J),XR(e)
- S(a);CHECK,N_GUARD::QAB1(B),XS(a)
- B(g);N_SPINP(c),OGATE,P_SPINP(d),XQ(B)::R1(I)
- B(g);OGATE,XS(J)::R1(I)
- P(h);N_GUARD,XP(F)::S(J),XR(e)
- R(e);N_GUARD::QAR1(B),XP(c)
- R(e);N_GUARD,N_SPINS(f)::S(J)
- R(e);N_GUARD,S_CUTB(g)::QAB1(B)
- R(e);N_GUARD::S(J)
- B(g);OGATE::R1(I)
- B(g);N_SPINS(f),OGATE::R1(I)
- B(g);S_CUTR(e)::S(J)
- S(a);N_GUARD::QAB1(B)
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