MESON Chess Problem Database
Problem Display
PID: 261320 (7Q/4p3/8/3P1N1N/2B1k1P1/4ppR1/4n3/7K w - - 0 1)
Hoek, Willem
Neue Zurcher Zeitung, 1986
#2
8 + 5
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sxg3+
- 2.Sfxg3#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...f2
- 2.Rxe3#
- 1...e6
- 2.Sd6#
- 1...Sc1
- Tries
- 1.Kh2?
- 1...Sxg3
- 2.Sfxg3#
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...f2
- 2.Rxe3#
- 1...e6
- 2.Sd6#
- 1...e5!
- 1...Sxg3
- 1.Rh3?
- 1...Sg3+
- 2.Sfxg3#
- 1...Sc1
- 2.Sfg3#
- 2.Qd4#
- 1...Sg1
- 2.Sfg3#
- 2.Qd4#
- 1...Sc3
- 2.Sfg3#
- 2.Qd4#
- 1...Sd4
- 2.Sfg3#
- 2.Qxd4#
- 1...Sf4
- 2.Sfg3#
- 2.Shg3#
- 2.Qd4#
- 1...f2
- 2.Rxe3#
- 1...e6
- 2.Sd6#
- 1...e5!
- 1...Sg3+
- 1.Qa1?
- 1...Sxg3+
- 2.Sfxg3#
- 1...Sd4
- 2.Qxd4#
- 1...e5
- 2.Sd6#
- 2.Qb1#
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sf4
- 2.Qd4#
- 1...f2
- 2.Rxe3#
- 1...e6
- 2.Sd6#
- 1...Sc3!
- 1...Sxg3+
- 1.Qb2?
- 1...Sxg3+
- 2.Sfxg3#
- 1...Sd4
- 2.Qxd4#
- 1...e5
- 2.Sd6#
- 2.Qb1#
- 2.Qc2#
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sf4
- 2.Qd4#
- 1...f2
- 2.Rxe3#
- 1...e6
- 2.Sd6#
- 1...Sc3!
- 1...Sxg3+
- 1.Qc3?
- threat
- 2.Qxe3#
- 1...Sxg3+
- 2.Sfxg3#
- 1...Sxc3!
- threat
- 1.Qg7?
- threat
- 2.Qxe7#
- 1...Sxg3+
- 2.Sfxg3#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...e6
- 2.Sd6#
- 1...e5!
- threat
- 1.Qh6?
- threat
- 2.Qxe3#
- 2.Qe6#
- 1...Ke5
- 2.Qxe3#
- 2.Qe6#
- 1...e5
- 2.Sf6#
- 2.Qxe3#
- 1...Sd4
- 2.Qxe3#
- 2.Qf4#
- 1...Sf4
- 2.Qxf4#
- 1...e6
- 2.Qxe3#
- 2.Qxe6#
- 1...Sxg3+!
- threat
- 1.d6?
- 1...Sxg3+
- 2.Sfxg3#
- 1...exd6
- 2.Sxd6#
- 2.Qe8#
- 1...e5
- 2.Qa8#
- 1...Sc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...f2
- 2.Rxe3#
- 1...e6!
- 1...Sxg3+
- 1.Kh2?
- Keys
- 1.Qb8!
- 1...Sxg3+
- 2.Shxg3#
- 1...e5
- 2.Qb1#
- 1...Sc1
- 2.Qf4#
- 1...Sg1
- 2.Qf4#
- 1...Sc3
- 2.Qf4#
- 1...Sd4
- 2.Qf4#
- 1...Sf4
- 2.Qxf4#
- 1...f2
- 2.Rxe3#
- 1...e6
- 2.Sf6#
- 1...Sxg3+
- 1.Qb8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 7
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAR1(H)
- S(a);CHECK,XR(B)::S(F),XS(a)
- S(a);N_GUARD::QAR1(H),XS(a)
- P(c);OGATE::R1(B),XP(b)
- P(e);N_GUARD::S(F)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- S(a);N_GUARD::QAR1(H)
- S(a);N_GUARD::QAR1(H),XS(a)
- P(c);OGATE::R1(B),XP(b)
- P(e);N_GUARD::S(F)
- Refutation
- P(e);
- Try
- R(B);
- Vars
- S(a);CHECK,N_GUARD::S(F),XS(a)
- P(c);OGATE::R1(B),XP(b)
- P(e);N_GUARD::S(F)
- Refutation
- P(e);
- Try
- Q(H);
- Vars
- S(a);CHECK,XR(B)::S(F),XS(a)
- S(a);N_GUARD::QAR1(H),XS(a)
- S(a);N_GUARD::QAR1(H)
- P(c);OGATE::R1(B),XP(b)
- P(e);N_GUARD::S(F)
- Refutation
- S(a);
- Try
- Q(H);
- Vars
- S(a);CHECK,XR(B)::S(F),XS(a)
- S(a);N_GUARD::QAR1(H),XS(a)
- S(a);N_GUARD::QAR1(H)
- P(c);OGATE::R1(B),XP(b)
- P(e);N_GUARD::S(F)
- Refutation
- S(a);
- Try
- Q(H);
- Threat
- QAR1(H),XP(b)
- Vars
- S(a);CHECK,XR(B)::S(F),XS(a)
- Refutation
- S(a);XQ(H)
- Try
- Q(H);
- Threat
- QAR(H),XP(e)
- Vars
- S(a);CHECK,XR(B)::S(F),XS(a)
- S(a);N_GUARD::QAR1(H),XS(a)
- S(a);N_GUARD::QAR1(H)
- P(e);N_GUARD::S(F)
- Refutation
- P(e);
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::QAR1(H),XS(a)
- Refutation
- S(a);CHECK,XR(B)
- Try
- P(E);
- Vars
- S(a);CHECK,XR(B)::S(F),XS(a)
- P(e);SBLOCK::QAB(H)
- S(a);N_GUARD::QAR1(H)
- S(a);N_GUARD::QAR1(H),XS(a)
- P(c);OGATE::R1(B),XP(b)
- Refutation
- P(e);
- Try
- Actual
- Q(H);
- Vars
- S(a);CHECK,XR(B)::S(G),XS(a)
- P(e);SBLOCK::QAB(H)
- S(a);N_GUARD::QAR1(H)
- S(a);N_GUARD::QAR1(H),XS(a)
- P(c);OGATE::R1(B),XP(b)
- P(e);N_GUARD::S(G)
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