MESON Chess Problem Database
Problem Display
PID: 195769 (8/8/8/2Bp4/R1b1B3/1pkN4/1p1N4/rQ1K4 w - - 0 1)
de Lange, C
Haagsche Post 02. TT, 1921
#2
7 + 6
SOLUTION
- SOUND
- Sets
- 1...Rxb1+
- 2.Sxb1#
- 1...Ra3
- 2.Qxb2#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...dxe4
- 2.Sxe4#
- 2.Rxc4#
- 1...d4
- 2.Bb4#
- 2.Rxc4#
- 1...Rxb1+
- Tries
- 1.Sf3?
- threat
- 2.Bb4#
- 2.Bd4#
- 1...Rxa4
- 2.Bd4#
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...d4
- 2.Bb4#
- 2.Bxd4#
- 1...Rxb1+!
- threat
- 1.Bxd5?
- threat
- 2.Se4#
- 2.Rxc4#
- 1...Rxa4
- 2.Se4#
- 1...Bxd3
- 2.Bd4#
- 1...Bxd5
- 2.Bd4#
- 1...Bb5
- 2.Se4#
- 2.Bd4#
- 1...Ba6
- 2.Se4#
- 2.Bd4#
- 1...Rxb1+!
- threat
- 1.Bf5?
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...Ra3
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...d4
- 2.Se4#
- 2.Bb4#
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Bg6?
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...Ra3
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...d4
- 2.Se4#
- 2.Bb4#
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Bh7?
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...Ra3
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...d4
- 2.Se4#
- 2.Bb4#
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Bg1?
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...dxe4
- 2.Sxe4#
- 2.Rxc4#
- 1...Ra3
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...d4
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Bf2?
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...dxe4
- 2.Sxe4#
- 2.Rxc4#
- 1...Ra3
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...d4
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Be3?
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...dxe4
- 2.Sxe4#
- 2.Rxc4#
- 1...Ra3
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...d4
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Bb6?
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 2.Ba5#
- 1...dxe4
- 2.Sxe4#
- 2.Rxc4#
- 1...Ra3
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 2.Ba5#
- 1...Ba6
- 2.Bd4#
- 2.Ba5#
- 1...d4
- 2.Ba5#
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Ba7?
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa4
- 2.Qxb2#
- 1...Bxd3
- 2.Bd4#
- 1...dxe4
- 2.Sxe4#
- 2.Rxc4#
- 1...Ra3
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 1...Ba6
- 2.Bd4#
- 1...d4
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Rb4?
- 1...Rxb1+
- 2.Sxb1#
- 1...Bxd3
- 2.Rxb3#
- 1...dxe4
- 2.Sxe4#
- 2.Rxc4#
- 1...Ra3
- 2.Qxb2#
- 1...Ra4
- 2.Qxb2#
- 1...Ra5
- 2.Qxb2#
- 1...Ra6
- 2.Qxb2#
- 1...Ra7
- 2.Qxb2#
- 1...Ra8
- 2.Qxb2#
- 1...Bb5
- 2.Bd4#
- 2.Rxb3#
- 1...Ba6
- 2.Bd4#
- 2.Rxb3#
- 1...d4
- 2.Rxc4#
- 1...Ra2!
- 1...Rxb1+
- 1.Sf3?
- Keys
- 1.Ra3!
- 1...Rxb1+
- 2.Sxb1#
- 1...Rxa3
- 2.Qxb2#
- 1...Bxd3
- 2.Rxb3#
- 1...dxe4
- 2.Sxe4#
- 1...Ra2
- 2.Qc2#
- 1...Bb5
- 2.Rxb3#
- 1...Ba6
- 2.Rxb3#
- 1...d4
- 2.Bb4#
- 1...Rxb1+
- 1.Ra3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 3
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- B(e);XS(D)::B(G)
- B(e);::B(G)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- B(e);XS(D)::B(G)
- B(e);::B(G)
- Refutation
- R(a);CHECK,XQ(A)
- Try
- B(F);XP(f)
- Threat
- DUALS(2)
- Vars
- R(a);N_PINQ(A),XR(E)::S(C)
- B(e);XS(D)::B(G)
- B(e);XB(F)::B(G)
- Refutation
- R(a);CHECK,XQ(A)
- Try
- B(F);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- B(e);XS(D)::B(G)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- B(e);::B(G)
- Refutation
- R(a);N_PINQ(A)
- Try
- B(F);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- B(e);XS(D)::B(G)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- B(e);::B(G)
- Refutation
- R(a);N_PINQ(A)
- Try
- B(F);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- B(e);XS(D)::B(G)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- B(e);::B(G)
- Refutation
- R(a);N_PINQ(A)
- Try
- B(G);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- B(e);XS(D)::B(G)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- B(e);::B(G)
- P(f);N_GUARD::R1(E),XB(e)
- Refutation
- R(a);N_PINQ(A)
- Try
- B(G);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- B(e);XS(D)::B(G)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- B(e);::B(G)
- P(f);N_GUARD::R1(E),XB(e)
- Refutation
- R(a);N_PINQ(A)
- Try
- B(G);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- B(e);XS(D)::B(G)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- B(e);::B(G)
- P(f);N_GUARD::R1(E),XB(e)
- Refutation
- R(a);N_PINQ(A)
- Try
- B(G);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- Refutation
- R(a);N_PINQ(A)
- Try
- B(G);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),XR(E)::QAB1(A),XP(b)
- B(e);XS(D)::B(G)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- B(e);::B(G)
- P(f);N_GUARD::R1(E),XB(e)
- Refutation
- R(a);N_PINQ(A)
- Try
- R(E);
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- B(e);N_GUARD,XS(D)::R1(E),XP(c)
- R(a);N_PINQ(A)::QAB1(A),XP(b)
- P(f);N_GUARD::R1(E),XB(e)
- Refutation
- R(a);N_PINQ(A)
- Try
- Actual
- R(E);P_PINP(c)
- Vars
- R(a);CHECK,XQ(A)::S(C),XR(a)
- R(a);N_PINQ(A),N_SPINP(c),XR(E)::QAB1(A),XP(b)
- B(e);N_GUARD,XS(D)::R1(E),XP(c)
- P(f);XB(F)::S(C),XP(f)
- R(a);N_PINQ(A)::QAR1(A)
- B(e);N_GUARD::R1(E),XP(c)
- P(f);SBLOCK::B(G)
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