MESON Chess Problem Database
Problem Display
PID: 117804 (8/2p2K2/4R3/3kpNb1/1Q6/8/8/8 w - - 0 1)
Niemeijer, Meindert
Haagsche Post, 1943
#2
4 + 4
| 6490 | yacpdb | 2009 |
| 5454 | Near Snap | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Bc1
- 2.Se7#
- 1...Bd2
- 2.Se7#
- 1...Be3
- 2.Sxe3#
- 2.Se7#
- 1...Bf4
- 2.Se7#
- 1...Bh4
- 2.Se3#
- 1...Bf6
- 2.Se3#
- 1...Bh6
- 2.Se7#
- 1...Be7
- 2.Se3#
- 2.Sxe7#
- 1...Bd8
- 2.Se3#
- 1...e4
- 2.Qd4#
- 1...c5
- 2.Rd6#
- 1...c6
- 2.Rd6#
- 1...Bc1
- Tries
- 1.Rxe5+?
- 1...Kc6
- 2.Qb5#
- 1...Kxe5!
- 1...Kc6
- 1.Ra6?
- 1...e4
- 2.Qd4#
- 1...Bc1
- 2.Se7#
- 1...Bd2
- 2.Se7#
- 1...Be3
- 2.Sxe3#
- 2.Se7#
- 1...Bf4
- 2.Se7#
- 1...Bh4
- 2.Se3#
- 1...Bf6
- 2.Se3#
- 1...Bh6
- 2.Se7#
- 1...Be7
- 2.Se3#
- 2.Sxe7#
- 1...Bd8
- 2.Se3#
- 1...c5
- 2.Rd6#
- 1...c6!
- 1...e4
- 1.Rc6?
- threat
- 2.Rc5#
- 2.Qc4#
- 1...e4
- 2.Rc5#
- 2.Qc5#
- 2.Qb5#
- 1...Be3
- 2.Se7#
- 2.Qc4#
- 1...Be7
- 2.Sxe7#
- 2.Qc4#
- 1...Kxc6!
- threat
- 1.Rf6?
- threat
- 2.Se7#
- 1...e4
- 2.Qd4#
- 1...Bxf6!
- threat
- 1.Rg6?
- 1...e4
- 2.Qd4#
- 1...Bc1
- 2.Se7#
- 1...Bd2
- 2.Se7#
- 1...Be3
- 2.Sxe3#
- 2.Se7#
- 1...Bf4
- 2.Se7#
- 1...Bh4
- 2.Se3#
- 1...Bh6
- 2.Se7#
- 1...Be7
- 2.Se3#
- 2.Sxe7#
- 1...Bd8
- 2.Se3#
- 1...c5
- 2.Rd6#
- 1...c6
- 2.Rd6#
- 1...Bf6!
- 1...e4
- 1.Rh6?
- 1...Bxh6
- 2.Se7#
- 1...e4
- 2.Qd4#
- 1...Bc1
- 2.Se7#
- 1...Bd2
- 2.Se7#
- 1...Be3
- 2.Sxe3#
- 2.Se7#
- 1...Bf4
- 2.Se7#
- 1...Bh4
- 2.Se3#
- 1...Be7
- 2.Se3#
- 2.Sxe7#
- 1...Bd8
- 2.Se3#
- 1...c5
- 2.Rd6#
- 1...c6
- 2.Rd6#
- 1...Bf6!
- 1...Bxh6
- 1.Qc3?
- threat
- 2.Rxe5#
- 2.Qc6#
- 1...Bf4
- 2.Qc6#
- 1...Bf6
- 2.Qc6#
- 1...e4
- 2.Re5#
- 2.Qd4#
- 2.Qc6#
- 1...c5
- 2.Qd3#
- 1...c6
- 2.Rxe5#
- 2.Qxc6#
- 1...Ke4!
- threat
- 1.Qa4?
- threat
- 2.Qc6#
- 1...c5
- 2.Rd6#
- 1...c6
- 2.Qxc6#
- 1...Kc5!
- threat
- 1.Qb5+?
- 1...c5
- 2.Qd3#
- 1...Ke4!
- 1...c5
- 1.Rxe5+?
- Keys
- 1.Sd6!
- threat
- 2.Qc4#
- 1...Kc6
- 2.Qb5#
- 1...cxd6
- 2.Rxd6#
- 1...c5
- 2.Qe4#
- threat
- 1.Sd6!
Anticipated by 117803(1925)
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- B(c);N_GUARD::S(B)
- P(b);N_GUARD::QAR1(A)
- P(d);N_GUARD::R1(C)
- Tries
- Try
- R(C);CHECK,XP(b)
- Vars
- K(a);S_FLIGHT::QAB1(A)
- Refutation
- K(a);P-FLIGHT,XR(C)
- Try
- R(C);
- Vars
- P(b);N_GUARD::QAR1(A)
- B(c);N_GUARD::S(B)
- P(d);N_GUARD::R1(C)
- Refutation
- P(d);
- Try
- R(C);
- Threat
- DUALS(2)
- Refutation
- K(a);S_FLIGHT,XR(C)
- Try
- R(C);
- Threat
- S(B)
- Vars
- P(b);N_GUARD::QAR1(A)
- Refutation
- B(c);XR(C)
- Try
- R(C);
- Vars
- P(b);N_GUARD::QAR1(A)
- B(c);N_GUARD::S(B)
- P(d);N_GUARD::R1(C)
- Refutation
- B(c);
- Try
- R(C);
- Vars
- B(c);N_GUARD,XR(C)::S(B)
- P(b);N_GUARD::QAR1(A)
- B(c);N_GUARD::S(B)
- P(d);N_GUARD::R1(C)
- Refutation
- B(c);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(c);::QAB1(A)
- P(d);SBLOCK::QAR2(A)
- Refutation
- K(a);P_SPINP(b),S_FLIGHT
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- P(d);N_GUARD,SBLOCK::R1(C)
- P(d);::QAB1(A),XP(d)
- Refutation
- K(a);P-FLIGHT
- Try
- Q(A);CHECK
- Vars
- P(d);P_SPINP(d),SBLOCK::QAR2(A)
- Refutation
- K(a);P_SPINP(b),S_FLIGHT
- Try
- Actual
- S(B);
- Threat
- QAB1(A)
- Vars
- K(a);S_FLIGHT::QAB1(A)
- P(d);OGATE,XS(B)::R1(C),XP(d)
- P(d);SBLOCK::QAB1(A)
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