MESON Chess Problem Database
Problem Display
PID: 169844 (3Q2b1/KNR3n1/2N4r/1kn5/p5R1/1p6/8/4b2B w - - 0 1)
O'Keefe, John James
To Alain White, 1945
#2
7 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxh1
- 2.Sd6#
- 1...Rh2
- 2.Sd6#
- 1...Rh3
- 2.Sd6#
- 1...Rh4
- 2.Sd6#
- 1...Rh5
- 2.Sd6#
- 1...Rxc6
- 2.Bxc6#
- 1...Rd6
- 2.Sxd6#
- 1...Rh7
- 2.Sd6#
- 1...Rh8
- 2.Sd6#
- 1...Bf2
- 2.Rb4#
- 1...Bg3
- 2.Rb4#
- 1...Bb4
- 2.Rxb4#
- 1...Bh4
- 2.Rb4#
- 1...Be6
- 2.Sd6#
- 1...Sce6
- 2.Qd3#
- 1...Sge6
- 2.Sd6#
- 1...Rxh1
- Tries
- 1.Qe7?
- threat
- 2.Qxc5#
- 1...Rxc6
- 2.Bxc6#
- 1...Sxb7
- 2.Rxb7#
- 1...Se4
- 2.Sd4#
- 1...Rh5
- 2.Sd6#
- 1...Rd6
- 2.Sxd6#
- 1...Bf2
- 2.Rb4#
- 1...Bb4
- 2.Rxb4#
- 1...Sd3
- 2.Sd4#
- 1...Sa6
- 2.Sd4#
- 1...Sd7
- 2.Sd4#
- 1...Sge6
- 2.Sd6#
- 1...Sce6!
- threat
- 1.Qd2?
- threat
- 2.Rb4#
- 1...Sxb7
- 2.Sd4#
- 1...Se4
- 2.Sd4#
- 1...Rh4
- 2.Sd6#
- 1...Bc4
- 2.Sd4#
- 1...Sd3
- 2.Sd4#
- 1...Sa6
- 2.Sd4#
- 1...Bxd2!
- threat
- 1.Qd3+?
- 1...Bc4
- 2.Qxc4#
- 1...Sxd3!
- 1...Bc4
- 1.Qd4?
- threat
- 2.Qxc5#
- 1...Rxc6
- 2.Bxc6#
- 1...Sxb7
- 2.Rxb7#
- 2.Qb6#
- 1...Rh5
- 2.Sd6#
- 1...Bf2
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Sd3
- 2.Qb6#
- 2.Qxa4#
- 1...Sa6
- 2.Qb6#
- 2.Qxa4#
- 1...Sce6
- 2.Sd6#
- 2.Qb6#
- 2.Qd3#
- 2.Qxa4#
- 2.Qc4#
- 1...Sd7
- 2.Qxa4#
- 1...Sge6
- 2.Sd6#
- 2.Qc4#
- 1...Se4!
- threat
- 1.Qd5?
- threat
- 2.Qxc5#
- 1...Rxc6
- 2.Qxc6#
- 1...Rh5
- 2.Sd6#
- 1...Bf2
- 2.Rb4#
- 1...Bb4
- 2.Sd4#
- 2.Rxb4#
- 1...Se6
- 2.Sd6#
- 2.Qc4#
- 1...Bxd5!
- threat
- 1.Qe7?
- Keys
- 1.Qf8!
- threat
- 2.Qxc5#
- 1...Rxc6
- 2.Bxc6#
- 1...Sxb7
- 2.Rxb7#
- 1...Se4
- 2.Sd4#
- 1...Rh5
- 2.Sd6#
- 1...Rd6
- 2.Sxd6#
- 1...Bf2
- 2.Rb4#
- 1...Bb4
- 2.Rxb4#
- 1...Sd3
- 2.Sd4#
- 1...Sa6
- 2.Sd4#
- 1...Sce6
- 2.Qf1#
- 1...Sd7
- 2.Sd4#
- 1...Sge6
- 2.Sd6#
- threat
- 1.Qf8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 9
- Sets
- R(f);N_GUARD,XB(A)::S(E)
- R(f);N_GUARD::S(E)
- R(f);OGATE,XS(C)::B(A),XR(f)
- R(f);N_GUARD::S(E),XR(f)
- B(a);N_GUARD::R1(B)
- B(a);N_GUARD::R1(B),XB(a)
- B(h);S_CUTR(f)::S(E)
- S(e);N_GUARD,S_CUTB(h)::QAB(G)
- S(g);S_CUTR(f)::S(E)
- Tries
- Try
- Q(G);
- Threat
- QAR1(G),XS(e)
- Vars
- R(f);OGATE,XS(C)::B(A),XR(f)
- S(e);OGATE,XS(E)::R(F),XS(e)
- S(e);::S(C)
- R(f);N_GUARD::S(E)
- R(f);N_GUARD::S(E),XR(f)
- B(a);N_GUARD::R1(B)
- B(a);N_GUARD::R1(B),XB(a)
- S(g);S_CUTR(f)::S(E)
- Refutation
- S(e);
- Try
- Q(G);
- Threat
- R1(B)
- Vars
- S(e);XS(E)::S(C)
- S(e);::S(C)
- R(f);N_GUARD::S(E)
- B(h);SBLOCK::S(C)
- Refutation
- B(a);XQ(G)
- Try
- Q(G);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAB1(G),XB(h)
- Refutation
- S(e);XQ(G)
- Try
- Q(G);
- Threat
- QAR1(G),XS(e)
- Vars
- R(f);OGATE,XS(C)::B(A),XR(f)
- R(f);N_GUARD::S(E)
- B(a);N_GUARD::QAR1(G)
- B(a);N_GUARD::QAR1(G),XB(a)
- S(e);N_GUARD::QAB1(G),XP(c)
- Refutation
- S(e);
- Try
- Q(G);P_PINS(e)
- Threat
- QAR1(G),XS(e)
- Vars
- R(f);OGATE,XS(C)::QAB1(G),XR(f)
- R(f);N_GUARD::S(E)
- B(a);N_GUARD::R1(B)
- Refutation
- B(h);N_SPINS(e),XQ(G)
- Try
- Actual
- Q(G);
- Threat
- QAR1(G),XS(e)
- Vars
- R(f);OGATE,XS(C)::B(A),XR(f)
- S(e);OGATE,XS(E)::R(F),XS(e)
- S(e);::S(C)
- R(f);N_GUARD::S(E)
- R(f);N_GUARD::S(E),XR(f)
- B(a);N_GUARD::R1(B)
- B(a);N_GUARD::R1(B),XB(a)
- S(e);N_GUARD,S_CUTB(h)::QAB(G)
- S(g);S_CUTR(f)::S(E)
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