MESON Chess Problem Database
Problem Display
PID: 231594 (5B2/8/3n2N1/3k1P2/Q2n4/3N4/1PB2PK1/8 w - - 0 1)
Johner, Hans
Neue Zurcher Zeitung, 1927
#2
9 + 3
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ke4
- 2.Sdf4#
- 1...Sxc2
- 2.Sgf4#
- 2.Se7#
- 1...Se2
- 2.Se7#
- 1...Sb3
- 2.Sgf4#
- 2.Se7#
- 1...Sf3
- 2.Sgf4#
- 2.Se7#
- 1...S4b5
- 2.Se7#
- 1...S4xf5
- 2.Sgf4#
- 1...Sc6
- 2.Sgf4#
- 1...Se6
- 2.Se7#
- 1...Sc4
- 2.Sb4#
- 2.Sdf4#
- 1...Se4
- 2.Sdf4#
- 2.Sgf4#
- 1...S6xf5
- 2.Sdf4#
- 1...Sb7
- 2.Sdf4#
- 1...Sf7
- 2.Sdf4#
- 1...Sc8
- 2.Sdf4#
- 1...Se8
- 2.Sdf4#
- 1...Ke4
- Tries
- 1.Bb1?
- 1...Ke4
- 2.Sdf4#
- 1...S4xf5
- 2.Sgf4#
- 1...S6xf5
- 2.Sdf4#
- 1...Sc2
- 2.Sgf4#
- 2.Se7#
- 1...Se2
- 2.Se7#
- 1...Sb3
- 2.Sgf4#
- 2.Se7#
- 1...Sf3
- 2.Sgf4#
- 2.Se7#
- 1...S4b5
- 2.Se7#
- 1...Sc6
- 2.Sgf4#
- 1...Se6
- 2.Se7#
- 1...Sc4
- 2.Sb4#
- 2.Sdf4#
- 1...Se4
- 2.Sdf4#
- 2.Sgf4#
- 1...Sb7
- 2.Sdf4#
- 1...Sf7
- 2.Sdf4#
- 1...Sc8
- 2.Sdf4#
- 1...Se8
- 2.Sdf4#
- 1...S6b5!
- 1...Ke4
- 1.Qc4+?
- 1...Ke4
- 2.Sc1#
- 2.Se1#
- 2.Sb4#
- 2.Sdf4#
- 2.Sc5#
- 2.Sde5#
- 1...Sxc4
- 2.Sb4#
- 1...Kxc4!
- 1...Ke4
- 1.f3?
- threat
- 2.Sgf4#
- 2.Se7#
- 1...S4xf5
- 2.Sgf4#
- 1...S6xf5
- 2.Sdf4#
- 2.Sgf4#
- 1...S4b5
- 2.Se7#
- 1...Se2
- 2.Se7#
- 1...Sc6
- 2.Sgf4#
- 1...Se6
- 2.Se7#
- 1...Sc4
- 2.Sb4#
- 2.Sdf4#
- 2.Sgf4#
- 1...Se4
- 2.Sdf4#
- 2.Sgf4#
- 1...Sb7
- 2.Sdf4#
- 2.Sgf4#
- 1...Sf7
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc8
- 2.Sdf4#
- 2.Sgf4#
- 1...Se8
- 2.Sdf4#
- 2.Sgf4#
- 1...S6b5!
- threat
- 1.Bb1?
- Keys
- 1.b3!
- 1...Ke4
- 2.Sdf4#
- 1...Sxc2
- 2.Sgf4#
- 2.Se7#
- 1...Sxb3
- 2.Sgf4#
- 2.Se7#
- 1...S4xf5
- 2.Sgf4#
- 1...S6xf5
- 2.Sdf4#
- 1...S6b5
- 2.Sb4#
- 1...Se2
- 2.Se7#
- 1...Sf3
- 2.Sgf4#
- 2.Se7#
- 1...S4b5
- 2.Se7#
- 1...Sc6
- 2.Sgf4#
- 1...Se6
- 2.Se7#
- 1...Sc4
- 2.Sb4#
- 2.Sdf4#
- 1...Se4
- 2.Sb4#
- 2.Sdf4#
- 2.Sgf4#
- 2.Qc4#
- 1...Sb7
- 2.Sb4#
- 2.Sdf4#
- 1...Sf7
- 2.Sb4#
- 2.Sdf4#
- 1...Sc8
- 2.Sb4#
- 2.Sdf4#
- 1...Se8
- 2.Sb4#
- 2.Sdf4#
- 1...Ke4
- 1.b3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- K(b);P_SPINS(a),S_FLIGHT::B(B)+S(E)
- S(a);::S(H)
- S(a);XP(G)::S(H)
- S(c);XP(G)::S(E)
- S(c);::S(E)
- Tries
- Try
- B(B);
- Vars
- K(b);P_SPINS(a),S_FLIGHT::B(B)+S(E)
- S(a);XP(G)::S(H)
- S(c);XP(G)::S(E)
- S(a);::S(H)
- S(c);::S(E)
- Refutation
- S(c);
- Try
- Q(F);CHECK
- Vars
- S(c);SBLOCK,XQ(F)::S(E)
- Refutation
- K(b);S_FLIGHT,XQ(F)
- Try
- P(C);
- Threat
- DUALS(2)
- Vars
- S(a);XP(G)::S(H)
- S(a);::S(H)
- Refutation
- S(c);
- Try
- Actual
- P(A);
- Vars
- K(b);P_SPINS(a),S_FLIGHT::B(B)+S(E)
- S(a);XP(G)::S(H)
- S(c);XP(G)::S(E)
- S(c);::S(E)
- S(a);::S(H)
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