MESON Chess Problem Database
Problem Display
PID: 268429 (K1Bn4/pppR2B1/4k3/5Np1/q5P1/8/8/1b3Q2 w - - 0 1)
Gallego, Augusto
Sunday Referee, 1929
(First published on Sun Jun 16 1929)
#2
7 + 8
| 15239 | Valois Notebooks | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Sd4#
- 1...Qb3
- 2.Sd4#
- 1...Qb5
- 2.Sd4#
- 1...Qc6
- 2.Sd4#
- 1...Qxd7
- 2.Qc4#
- 1...Qa1
- 2.Qc4#
- 1...Qa2
- 2.Sd4#
- 1...Qa3
- 2.Sd4#
- 2.Qc4#
- 1...Qc4
- 2.Qxc4#
- 1...Qd4
- 2.Sxd4#
- 1...Qa5
- 2.Sd4#
- 1...Qa6
- 2.Sd4#
- 1...Bxf5
- 2.Qxf5#
- 2.gxf5#
- 1...Sf7
- 2.Rd6#
- 1...Qc2
- Tries
- 1.Bb2?
- threat
- 2.Sg7#
- 1...Qxd7
- 2.Qc4#
- 1...Bxf5
- 2.Qxf5#
- 2.gxf5#
- 1...Qd4!
- threat
- 1.Bc3?
- threat
- 2.Sg7#
- 1...Qxd7
- 2.Qc4#
- 1...Bxf5
- 2.Qxf5#
- 2.gxf5#
- 1...Qd4!
- threat
- 1.Bd4?
- threat
- 2.Sg7#
- 1...Qxd7
- 2.Qc4#
- 1...Bxf5
- 2.Qxf5#
- 2.gxf5#
- 1...Qxd4!
- threat
- 1.Rd1+?
- 1...Qd7
- 2.Qc4#
- 1...Kf7!
- 1...Qd7
- 1.Rd2+?
- 1...Qd7
- 2.Qc4#
- 1...Kf7!
- 1...Qd7
- 1.Rd4+?
- 1...Qd7
- 2.Qc4#
- 1...Kf7!
- 1...Qd7
- 1.Rxc7+?
- 1...Qd7
- 2.Qc4#
- 1...Kd5!
- 1...Qd7
- 1.Rxd8+?
- 1...Qd7
- 2.Qc4#
- 1...Kf7!
- 1...Qd7
- 1.Qe2+?
- 1...Qe4
- 2.Sd4#
- 1...Be4!
- 1...Qe4
- 1.Qd3?
- threat
- 2.Re7#
- 2.Qd5#
- 1...Qxd7
- 2.Qc4#
- 2.Qb3#
- 2.Qxd7#
- 1...Qd4
- 2.Sxd4#
- 1...Qd1
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 1...Qb3
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 2.Qxb3#
- 1...Qb5
- 2.Sd4#
- 2.Re7#
- 1...Qc6
- 2.Sd4#
- 2.Re7#
- 1...Qa2
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 1...Qc4
- 2.Rxc7#
- 2.Re7#
- 2.Qxc4#
- 1...Qe4
- 2.Rxc7#
- 2.Re7#
- 1...Qa5
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 1...Ba2
- 2.Re7#
- 1...c6
- 2.Rxb7#
- 2.Rc7#
- 2.Re7#
- 2.Qd6#
- 1...Bxd3!
- threat
- 1.Qb5?
- threat
- 2.Rxc7#
- 2.Re7#
- 2.Qd5#
- 2.Qe5#
- 1...Qxb5
- 2.Sd4#
- 1...Bxf5
- 2.Qd5#
- 2.Qe5#
- 2.Qxf5#
- 2.gxf5#
- 1...Qd4
- 2.Sxd4#
- 2.Re7#
- 1...Qd1
- 2.Re7#
- 2.Qe5#
- 1...Qb3
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 2.Qxb3#
- 2.Qe5#
- 1...Qa1
- 2.Rxc7#
- 2.Re7#
- 2.Qc4#
- 2.Qb3#
- 2.Qd5#
- 1...Qa2
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 2.Qe5#
- 1...Qc4
- 2.Rxc7#
- 2.Re7#
- 2.Qxc4#
- 2.Qe5#
- 1...Qe4
- 2.Rxc7#
- 2.Re7#
- 1...Qf4
- 2.Rxc7#
- 2.Re7#
- 2.Qd5#
- 1...Qa5
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 1...Ba2
- 2.Rxc7#
- 2.Re7#
- 2.Qe5#
- 1...Be4
- 2.Rxc7#
- 2.Re7#
- 2.Qe5#
- 1...Sc6
- 2.Rxc7#
- 2.Re7#
- 2.Qd5#
- 1...Sf7
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rxc7#
- 2.Re7#
- 2.Rd8#
- 2.Qd5#
- 1...c6
- 2.Rxb7#
- 2.Rc7#
- 2.Re7#
- 2.Qe5#
- 1...c5!
- threat
- 1.Qe1+?
- 1...Qe4
- 2.Sd4#
- 1...Be4!
- 1...Qe4
- 1.Qh1?
- threat
- 2.Re7#
- 2.Qd5#
- 2.Qh6#
- 1...Qxg4
- 2.Rxc7#
- 2.Re7#
- 2.Qd5#
- 1...Bxf5
- 2.Qd5#
- 1...Qd4
- 2.Sxd4#
- 2.Re7#
- 1...Qd1
- 2.Re7#
- 2.Qh6#
- 1...Qb3
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 2.Qh6#
- 1...Qb5
- 2.Sd4#
- 2.Re7#
- 2.Qh6#
- 1...Qc6
- 2.Sd4#
- 2.Re7#
- 2.Qh6#
- 1...Qa1
- 2.Rxc7#
- 2.Re7#
- 2.Qd5#
- 1...Qa2
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 2.Qh6#
- 1...Qc4
- 2.Rxc7#
- 2.Re7#
- 2.Qh6#
- 1...Qe4
- 2.Qh6#
- 1...Qa5
- 2.Sd4#
- 2.Rxc7#
- 2.Re7#
- 2.Qh6#
- 1...Ba2
- 2.Re7#
- 2.Qh6#
- 1...Be4
- 2.Qh6#
- 1...Sf7
- 2.Rd6#
- 2.Re7#
- 2.Qd5#
- 1...c6
- 2.Rxb7#
- 2.Rc7#
- 2.Re7#
- 2.Qh6#
- 1...Qxd7!
- threat
- 1.Bb2?
- Keys
- 1.Qh3!
- threat
- 2.Qh6#
- 1...Qxd7
- 2.Qb3#
- 1...Qxg4
- 2.Sd4#
- 1...Bxf5
- 2.gxf5#
- 1...Qd4
- 2.Sxd4#
- 1...Qa1
- 2.Qb3#
- 1...Sf7
- 2.Rd6#
- threat
- 1.Qh3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- Q(b);N_GUARD::S(C)
- Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB(A)
- Q(b);N_GUARD::QAB(A)
- Q(b);N_GUARD::QAB(A),XQ(b)
- Q(b);N_GUARD::S(C),XQ(b)
- S(h);SBLOCK::B(G)+R(D),DCHECK
- Tries
- Try
- B(E);
- Threat
- S(C)
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB(A)
- Refutation
- Q(b);
- Try
- B(E);
- Threat
- S(C)
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB(A)
- Refutation
- Q(b);
- Try
- B(E);
- Threat
- S(C)
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB(A)
- Refutation
- Q(b);XB(E)
- Try
- R(D);CHECK
- Vars
- Q(b);P_SPINQ(b)::QAB(A)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);CHECK
- Vars
- Q(b);P_SPINQ(b)::QAB(A)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);CHECK
- Vars
- Q(b);P_SPINQ(b)::QAB(A)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);CHECK,XP(g)
- Vars
- Q(b);P_SPINQ(b)::QAB(A)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);CHECK,XS(h)
- Vars
- Q(b);P_SPINQ(b)::QAB(A)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(A);CHECK
- Vars
- Q(b);P_SPINQ(b)::S(C)
- Refutation
- B(a);P_SPINB(a)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD::S(C),XQ(b)
- B(a);::B(G)+R(D),DCHECK
- Refutation
- B(a);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- Q(b);N_GUARD,XQ(A)::S(C)
- Refutation
- P(g);
- Try
- Q(A);CHECK
- Vars
- Q(b);P_SPINQ(b)::S(C)
- Refutation
- B(a);P_SPINB(a)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- B(a);XS(C)::QAB1(A)
- Q(b);::QAR(A)
- B(a);::QAR(A)
- Refutation
- Q(b);P_SPINQ(b),XR(D)
- Try
- Actual
- Q(A);
- Threat
- QAR(A)
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB(A)
- Q(b);N_GUARD,XP(B)::S(C)
- B(a);OGATE,XS(C)::P(B),XB(a)
- Q(b);N_GUARD::S(C),XQ(b)
- Q(b);N_GUARD::QAB(A)
- S(h);SBLOCK::B(G)+R(D),DCHECK
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