MESON Chess Problem Database
Problem Display
PID: 49148 (2b5/Kp3p2/1R1N1P2/p1kPPN2/2P3Q1/n2p1P2/3B1q2/8 w - - 0 1)
Dobbs, Gilbert S
La Strategie, 1907
#2
11 + 8
| 204 | Op de Hoogte | 1907 |
| 15 | British Chess Magazine | 1909 |
| 56 | The Problemist | 2007 |
| 1099 | WCSC | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Qd4#
- 1...Qg1
- 2.Qxg1#
- 1...Qe3
- 2.Bxe3#
- 1...Qg3
- 2.Be3#
- 2.Qd4#
- 1...Qd4
- 2.Qxd4#
- 1...Qh4
- 2.Be3#
- 1...Qf1
- 2.Be3#
- 2.Qd4#
- 1...Qxd2
- 2.Qd4#
- 1...Qe2
- 2.Qd4#
- 1...Qg2
- 2.Be3#
- 2.Qd4#
- 1...Qh2
- 2.Be3#
- 2.Qd4#
- 1...Qxf3
- 2.Qd4#
- 1...Bxf5
- 2.Sxb7#
- 1...Be6
- 2.Sxb7#
- 1...Bd7
- 2.Sxb7#
- 1...Sb1
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Sxc4
- 2.Rb5#
- 2.Qxc4#
- 1...Sb5+
- 2.Rxb5#
- 1...a4
- 2.Bb4#
- 1...Qe1
- Tries
- 1.Bc1?
- threat
- 2.Bxa3#
- 1...Sb5+
- 2.Rxb5#
- 1...Sxc4
- 2.Rb5#
- 2.Qxc4#
- 1...Qe1
- 2.Qd4#
- 1...Qa2
- 2.Be3#
- 2.Qd4#
- 1...Qd2
- 2.Qd4#
- 1...Sb1
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Qb2!
- threat
- 1.Bxa5?
- threat
- 2.Bb4#
- 1...Sb5+
- 2.Rxb5#
- 1...Sxc4
- 2.Rb5#
- 2.Qxc4#
- 1...Qe1
- 2.Qd4#
- 1...Qd2
- 2.Qd4#
- 1...Sc2
- 2.Rb5#
- 1...Qb2!
- threat
- 1.Rxb7?
- threat
- 2.Rc7#
- 1...Sb5+
- 2.Rxb5#
- 1...Qxd2
- 2.Qd4#
- 1...Bxb7
- 2.Sxb7#
- 1...Sxc4
- 2.Rb5#
- 2.Qxc4#
- 1...Bd7!
- threat
- 1.Qg1?
- threat
- 2.Qxf2#
- 1...Sb5+
- 2.Rxb5#
- 1...Sxc4
- 2.Rb5#
- 1...Qe3
- 2.Bxe3#
- 2.Qxe3#
- 1...Qd4
- 2.Qxd4#
- 1...Sc2
- 2.Rb5#
- 1...Qxg1!
- threat
- 1.Qe4?
- 1...Sb5+
- 2.Rxb5#
- 1...Qxd2
- 2.Qd4#
- 1...Qxf3
- 2.Qd4#
- 1...Bxf5
- 2.Sxb7#
- 1...Sxc4
- 2.Rb5#
- 2.Qxc4#
- 1...Qe1
- 2.Qd4#
- 1...Qe3
- 2.Bxe3#
- 2.Qxe3#
- 1...Qg3
- 2.Be3#
- 2.Qe3#
- 2.Qd4#
- 1...Qd4
- 2.Qxd4#
- 1...Qh4
- 2.Be3#
- 1...Qf1
- 2.Be3#
- 2.Qe3#
- 2.Qd4#
- 1...Qe2
- 2.Qd4#
- 1...Qg2
- 2.Be3#
- 2.Qe3#
- 2.Qd4#
- 1...Qh2
- 2.Be3#
- 2.Qe3#
- 2.Qd4#
- 1...Be6
- 2.Sxb7#
- 1...Bd7
- 2.Sxb7#
- 1...Sb1
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...a4
- 2.Bb4#
- 1...Qg1!
- 1...Sb5+
- 1.Qf4?
- 1...Sb5+
- 2.Rxb5#
- 1...Qxd2
- 2.Qd4#
- 1...Qxf3
- 2.Qd4#
- 1...Bxf5
- 2.Sxb7#
- 1...Sxc4
- 2.Rb5#
- 2.Qxc4#
- 1...Qe1
- 2.Qd4#
- 1...Qe3
- 2.Bxe3#
- 2.Qxe3#
- 1...Qg3
- 2.Be3#
- 2.Qe3#
- 2.Qd4#
- 1...Qd4
- 2.Qxd4#
- 1...Qh4
- 2.Be3#
- 1...Qf1
- 2.Be3#
- 2.Qe3#
- 2.Qd4#
- 1...Qe2
- 2.Qd4#
- 1...Qg2
- 2.Be3#
- 2.Qe3#
- 2.Qd4#
- 1...Qh2
- 2.Be3#
- 2.Qe3#
- 2.Qd4#
- 1...Be6
- 2.Sxb7#
- 1...Bd7
- 2.Sxb7#
- 1...Sb1
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...a4
- 2.Bb4#
- 1...Qg1!
- 1...Sb5+
- 1.e6?
- 1...Sb5+
- 2.Rxb5#
- 1...Qxd2
- 2.Qd4#
- 1...Qxf3
- 2.Qd4#
- 1...Bxe6
- 2.Sxb7#
- 1...Sxc4
- 2.Rb5#
- 2.Qxc4#
- 1...Qg1
- 2.Qxg1#
- 1...Qe1
- 2.Qd4#
- 1...Qe3
- 2.Bxe3#
- 1...Qg3
- 2.Be3#
- 2.Qd4#
- 1...Qd4
- 2.Qxd4#
- 1...Qh4
- 2.Be3#
- 1...Qf1
- 2.Be3#
- 2.Qd4#
- 1...Qe2
- 2.Qd4#
- 1...Qg2
- 2.Be3#
- 2.Qd4#
- 1...Qh2
- 2.Be3#
- 2.Qd4#
- 1...Bd7
- 2.Sxb7#
- 1...Sb1
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...a4
- 2.Bb4#
- 1...fxe6!
- 1...Sb5+
- 1.Bc1?
- Keys
- 1.Sd4!
- threat
- 2.Sb3#
- 1...Sb5+
- 2.Rxb5#
- 1...Qxd4
- 2.Qxc8#
- 1...Sxc4
- 2.Rb5#
- 1...a4
- 2.Bb4#
- threat
- 1.Sd4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 12
- Sets
- Q(a);N_GUARD::QAB1(D)
- Q(a);OGATEB::QAB(D),XQ(a)
- Q(a);N_GUARD::B(A),XQ(a)
- Q(a);N_GUARD::QAB1(D),XQ(a)
- Q(a);N_GUARD::B(A)
- Q(a);N_GUARD,XB(A)::QAB1(D)
- Q(a);N_GUARD,XP(B)::QAB1(D)
- B(h);N_GUARD,XS(G)::S(I),XP(f)
- B(h);N_GUARD::S(I),XP(f)
- S(b);N_GUARD::R1(H)
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- P(d);N_GUARD::B(A)
- Tries
- Try
- B(A);
- Threat
- B(A),XS(b)
- Vars
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- Q(a);N_GUARD::QAB1(D)
- S(b);N_GUARD::R1(H)
- Refutation
- Q(a);
- Try
- B(A);XP(d)
- Threat
- B(A)
- Vars
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- Q(a);N_GUARD::QAB1(D)
- S(b);N_GUARD::R1(H)
- Refutation
- Q(a);
- Try
- R(H);XP(f)
- Threat
- R(H)
- Vars
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- Q(a);N_GUARD,XB(A)::QAB1(D)
- B(h);XR(H)::S(I),XB(h)
- Refutation
- B(h);
- Try
- Q(D);P_PINQ(a)
- Threat
- QAB(D),XQ(a)
- Vars
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- S(b);N_GUARD,XP(C)::R1(H)
- Q(a);OGATE::QAB1(D),XQ(a)
- S(b);N_GUARD::R1(H)
- Refutation
- Q(a);N_SPINQ(a),XQ(D)
- Try
- Q(D);
- Vars
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- Q(a);N_GUARD,XB(A)::QAB1(D)
- Q(a);N_GUARD,XP(B)::QAB1(D)
- B(h);N_GUARD,XS(G)::S(I),XP(f)
- Q(a);N_GUARD::QAB1(D)
- Q(a);N_GUARD::QAB1(D),XQ(a)
- Q(a);N_GUARD::B(A)
- B(h);N_GUARD::S(I),XP(f)
- S(b);N_GUARD::R1(H)
- P(d);N_GUARD::B(A)
- Refutation
- Q(a);
- Try
- Q(D);
- Vars
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- Q(a);N_GUARD,XB(A)::QAB1(D)
- Q(a);N_GUARD,XP(B)::QAB1(D)
- B(h);N_GUARD,XS(G)::S(I),XP(f)
- Q(a);N_GUARD::QAB1(D)
- Q(a);N_GUARD::QAB1(D),XQ(a)
- Q(a);N_GUARD::B(A)
- B(h);N_GUARD::S(I),XP(f)
- S(b);N_GUARD::R1(H)
- P(d);N_GUARD::B(A)
- Refutation
- Q(a);
- Try
- P(F);
- Vars
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- Q(a);N_GUARD,XB(A)::QAB1(D)
- Q(a);N_GUARD,XP(B)::QAB1(D)
- B(h);N_GUARD,XP(F)::S(I),XP(f)
- Q(a);OGATEB::QAB(D),XQ(a)
- Q(a);N_GUARD::QAB1(D)
- Q(a);N_GUARD::B(A),XQ(a)
- Q(a);N_GUARD::QAB1(D),XQ(a)
- Q(a);N_GUARD::B(A)
- B(h);N_GUARD::S(I),XP(f)
- S(b);N_GUARD::R1(H)
- P(d);N_GUARD::B(A)
- Refutation
- P(g);XP(F)
- Try
- Actual
- S(G);
- Threat
- S(G)
- Vars
- S(b);CHECK,N_GUARD::R1(H),XS(b)
- Q(a);SBLOCK,XS(G)::QAR(D),XB(h)
- S(b);N_GUARD,XP(C)::R1(H)
- P(d);N_GUARD::B(A)
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