MESON Chess Problem Database
Problem Display
PID: 296 (8/1n6/pQ2p3/P1n3Pp/p2kB2R/B7/1p1P4/bK1R4 w - - 0 1)
van Dijk, Johannes
2nd HM., The Observer, 1920
(First published on Sun Sep 19 1920)
#2
9 + 9
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Kc4
- 2.Qb4#
- 1...Ke5
- 2.d4#
- 1...Sxa5
- 2.Qxc5#
- 1...Sd6
- 2.Qxc5#
- 1...Sd8
- 2.Qxc5#
- 1...e5
- 2.Qb4#
- 1...Kc4
- Tries
- 1.Bxb2+?
- 1...Kc4
- 2.Rc1#
- 1...Bxb2!
- 1...Kc4
- 1.Bxc5+?
- 1...Kc4
- 2.Qb4#
- 1...Ke5
- 2.Bd4#
- 2.d4#
- 1...Sxc5!
- 1...Kc4
- 1.Bg2+?
- 1...Kd3
- 2.Bf1#
- 1...Ke5!
- 1...Kd3
- 1.Bxb7+?
- 1...Ke5
- 2.Qxc5#
- 1...Kd3!
- 1...Ke5
- 1.Re1?
- 1...Kc4
- 2.Qb4#
- 1...Sxa5
- 2.Qxc5#
- 1...Sd6
- 2.Qxc5#
- 1...Sd8
- 2.Qxc5#
- 1...e5
- 2.Qb4#
- 1...Ke5!
- 1...Kc4
- 1.Rf1?
- 1...Kc4
- 2.Qb4#
- 1...Sxa5
- 2.Qxc5#
- 1...Sd6
- 2.Qxc5#
- 1...Sd8
- 2.Qxc5#
- 1...e5
- 2.Qb4#
- 1...Ke5!
- 1...Kc4
- 1.Rg1?
- 1...Kc4
- 2.Qb4#
- 1...Sxa5
- 2.Qxc5#
- 1...Sd6
- 2.Qxc5#
- 1...Sd8
- 2.Qxc5#
- 1...e5
- 2.Qb4#
- 1...Ke5!
- 1...Kc4
- 1.Rdh1?
- 1...Kc4
- 2.Qb4#
- 1...Sxa5
- 2.Qxc5#
- 1...Sd6
- 2.Qxc5#
- 1...Sd8
- 2.Qxc5#
- 1...e5
- 2.Qb4#
- 1...Ke5!
- 1...Kc4
- 1.Qxb2+?
- 1...Kc4
- 2.Rc1#
- 2.Qb4#
- 1...Bxb2!
- 1...Kc4
- 1.Qxe6?
- threat
- 2.Qd5#
- 1...Sxe4
- 2.Qxe4#
- 1...Sxe6!
- threat
- 1.g6?
- 1...Kc4
- 2.Qb4#
- 1...Sxa5
- 2.Qxc5#
- 1...Sd6
- 2.Qxc5#
- 1...Sd8
- 2.Qxc5#
- 1...e5
- 2.Qb4#
- 1...Ke5!
- 1...Kc4
- 1.Bxb2+?
- Keys
- 1.Qc6!
- 1...Kc4
- 2.Bc2#
- 1...Ke5
- 2.d4#
- 1...Sxe4
- 2.Qxe4#
- 1...Sxa5
- 2.Qxc5#
- 1...Sb3
- 2.Qc3#
- 1...Sd3
- 2.Qc3#
- 1...Sd7
- 2.Qc3#
- 1...Sd6
- 2.Qxc5#
- 1...Sd8
- 2.Qxc5#
- 1...e5
- 2.Qd5#
- 1...Kc4
- 1.Qc6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- K(d);N_SPINS(e),P-FLIGHT::QAR1(I)
- K(d);N_SPINS(e),OGATE,S_FLIGHT::P(C)
- S(i);N_GUARD,XP(G)::QAB1(I),XS(e)
- S(i);N_GUARD::QAB1(I),XS(e)
- P(h);SBLOCK::QAR2(I)
- Tries
- Try
- B(D);CHECK,XP(b)
- Vars
- K(d);N_SPINS(e),P-FLIGHT::R(B)
- Refutation
- B(a);XB(D)
- Try
- B(D);CHECK,XS(e)
- Vars
- K(d);P-FLIGHT::QAR1(I)
- Refutation
- S(i);P_SPINS(i),XB(D)
- Try
- B(E);CHECK
- Vars
- K(d);N_SPINS(e),P-FLIGHT::B(E)
- Refutation
- K(d);N_SPINS(e),S_FLIGHT
- Try
- B(E);CHECK,XS(i)
- Vars
- K(d);N_SPINS(e),S_FLIGHT::QAR2(I),XS(e)
- Refutation
- K(d);N_SPINS(e),P-FLIGHT
- Try
- R(B);
- Vars
- K(d);N_SPINS(e),P-FLIGHT::QAR1(I)
- S(i);N_GUARD,XP(G)::QAB1(I),XS(e)
- S(i);N_GUARD::QAB1(I),XS(e)
- P(h);SBLOCK::QAR2(I)
- Refutation
- K(d);N_SPINS(e),S_FLIGHT
- Try
- R(B);
- Vars
- K(d);N_SPINS(e),P-FLIGHT::QAR1(I)
- S(i);N_GUARD,XP(G)::QAB1(I),XS(e)
- S(i);N_GUARD::QAB1(I),XS(e)
- P(h);SBLOCK::QAR2(I)
- Refutation
- K(d);N_SPINS(e),S_FLIGHT
- Try
- R(B);
- Vars
- K(d);N_SPINS(e),P-FLIGHT::QAR1(I)
- S(i);N_GUARD,XP(G)::QAB1(I),XS(e)
- S(i);N_GUARD::QAB1(I),XS(e)
- P(h);SBLOCK::QAR2(I)
- Refutation
- K(d);N_SPINS(e),S_FLIGHT
- Try
- R(B);
- Vars
- K(d);N_SPINS(e),P-FLIGHT::QAR1(I)
- S(i);N_GUARD,XP(G)::QAB1(I),XS(e)
- S(i);N_GUARD::QAB1(I),XS(e)
- P(h);SBLOCK::QAR2(I)
- Refutation
- K(d);N_SPINS(e),S_FLIGHT
- Try
- Q(I);CHECK,N_PINS(e),XP(b)
- Refutation
- B(a);XQ(I)
- Try
- Q(I);N_PINS(e),XP(h)
- Threat
- QAR1(I)
- Vars
- S(e);OGATE,P_SPINS(e),XB(E)::QAR1(I),XS(e)
- Refutation
- S(e);XQ(I)
- Try
- P(H);
- Vars
- K(d);N_SPINS(e),P-FLIGHT::QAR1(I)
- S(i);N_GUARD,XP(G)::QAB1(I),XS(e)
- S(i);N_GUARD::QAB1(I),XS(e)
- P(h);SBLOCK::QAR2(I)
- Refutation
- K(d);N_SPINS(e),S_FLIGHT
- Try
- Actual
- Q(I);N_PINS(e)
- Vars
- K(d);P-FLIGHT,P_SPINS(e)::R(F)+B(E)
- K(d);OGATE,S_FLIGHT::P(C)
- S(e);OGATE,P_SPINS(e),XB(E)::QAR1(I),XS(e)
- S(i);N_GUARD,XP(G)::QAB1(I),XS(e)
- S(e);OGATE::QAB1(I)
- S(i);N_GUARD::QAB1(I),XS(e)
- P(h);N_GUARD::QAR1(I)
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