MESON Chess Problem Database
Problem Display
PID: 87421 (4Rbq1/4p1p1/1n1Nn1Rp/4k2K/1Q1pPp2/1N1P4/7B/8 w - - 0 1)
Andrade, Barry Jack da Costa
American Chess Problemist, 1950
#2
9 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...exd6
- 2.Qxd4#
- 1...Qf7
- Tries
- 1.Kg4?
- 1...exd6
- 2.Bxf4#
- 2.Qxd4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Bxf4#
- 2.Qxd4#
- 1...Sg5
- 2.Bxf4#
- 2.Qxd4#
- 1...Sc7
- 2.Bxf4#
- 2.Qxd4#
- 1...Sd8
- 2.Bxf4#
- 2.Qxd4#
- 1...h5+!
- 1...exd6
- 1.Kh4?
- 1...exd6
- 2.Qxd4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...h5!
- 1...exd6
- 1.Sxd4?
- threat
- 2.Sf3#
- 2.Sc6#
- 1...Sg5
- 2.Sc6#
- 1...Sd8
- 2.Sf3#
- 1...Sxd4!
- threat
- 1.Bg1?
- 1...exd6
- 2.Bxd4#
- 2.Qxd4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Bxd4#
- 2.Qxd4#
- 1...Sg5
- 2.Bxd4#
- 2.Qxd4#
- 1...Sc7
- 2.Bxd4#
- 2.Qxd4#
- 1...Sd8
- 2.Bxd4#
- 2.Qxd4#
- 1...f3!
- 1...exd6
- 1.Bg3?
- 1...exd6
- 2.Qxd4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...fxg3!
- 1...exd6
- 1.Rxe6+?
- 1...Qxe6
- 2.Qxd4#
- 1...Kxe6!
- 1...Qxe6
- 1.Rxe7?
- threat
- 2.Qxd4#
- 1...Sc4
- 2.Sxc4#
- 2.Qc5#
- 1...Sd5
- 2.Sc4#
- 1...Bxe7!
- threat
- 1.Ra8?
- 1...Sxa8
- 2.Sc4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...exd6!
- 1...Sxa8
- 1.Rb8?
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...exd6!
- 1...Qf7
- 1.Rc8?
- 1...Sxc8
- 2.Sc4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...exd6!
- 1...Sxc8
- 1.Rd8?
- 1...Sxd8
- 2.Qxd4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...exd6!
- 1...Sxd8
- 1.Rxf8?
- threat
- 2.Rf5#
- 1...Sxf8
- 2.Qxd4#
- 1...Qf7
- 2.Sxf7#
- 1...Qxf8!
- threat
- 1.Qd2?
- 1...exd6
- 2.Bxf4#
- 2.Qxf4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sc5
- 2.Bxf4#
- 2.Qxf4#
- 1...Sg5
- 2.Bxf4#
- 2.Qxf4#
- 1...Sc7
- 2.Bxf4#
- 2.Qxf4#
- 1...Sd8
- 2.Bxf4#
- 2.Qxf4#
- 1...Kxd6!
- 1...exd6
- 1.Qc5+?
- 1...Sd5
- 2.Sc4#
- 2.Qxd5#
- 1...Sxc5!
- 1...Sd5
- 1.Qc4?
- 1...Sxc4
- 2.Sxc4#
- 1...exd6
- 2.Qxd4#
- 1...Sc5
- 2.Qxd4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 2.Rxe6#
- 2.Qxe6#
- 1...Qh8
- 2.Sf7#
- 2.Rxe6#
- 2.Qxe6#
- 1...Sa4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sd7
- 2.Qd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...Kxd6!
- 1...Sxc4
- 1.Qb5+?
- 1...Kxd6
- 2.Bxf4#
- 1...Sd5
- 2.Sc4#
- 2.Qxd5#
- 1...Sc5!
- 1...Kxd6
- 1.Qxb6?
- threat
- 2.Sc4#
- 1...exd6
- 2.Qxd4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...Sc5!
- threat
- 1.Kg4?
- Keys
- 1.Qa4!
- 1...Kxd6
- 2.Bxf4#
- 1...Sxa4
- 2.Sc4#
- 1...exd6
- 2.Qxd4#
- 1...Sc5
- 2.Qxd4#
- 1...Qf7
- 2.Sxf7#
- 1...Qh7
- 2.Sf7#
- 1...Qh8
- 2.Sf7#
- 1...Sc4
- 2.Sxc4#
- 1...Sd5
- 2.Sc4#
- 1...Sd7
- 2.Sc4#
- 1...Sa8
- 2.Sc4#
- 1...Sc8
- 2.Sc4#
- 1...Sg5
- 2.Qxd4#
- 1...Sc7
- 2.Qxd4#
- 1...Sd8
- 2.Qxd4#
- 1...Kxd6
- 1.Qa4!
There are these versions: 114825
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(e);N_GUARD::QAB1(D),XP(a)
- P(g);P_SPINS(e),XS(G)::QAB1(D),XP(a)
- Tries
- Try
- K(F);S_FLIGHT
- Vars
- Q(j);N_GUARD::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- Refutation
- P(f);CHECK
- Try
- K(F);P-FLIGHT
- Vars
- P(g);P_SPINS(e),XS(G)::QAB1(D),XP(a)
- Q(j);N_GUARD::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(e);N_GUARD::QAB1(D),XP(a)
- Refutation
- P(f);
- Try
- S(B);XP(a)
- Threat
- DUALS(2)
- Vars
- S(e);::S(B)
- Refutation
- S(e);XS(B)
- Try
- B(A);N_PINP(b)
- Vars
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- Refutation
- P(b);
- Try
- B(A);
- Vars
- P(g);P_SPINS(e),XS(G)::QAB1(D),XP(a)
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(e);N_GUARD::QAB1(D),XP(a)
- Refutation
- P(b);N_SPINP(b),XB(A)
- Try
- R(H);CHECK,XS(e)
- Vars
- Q(j);SBLOCK,XR(H)::QAB1(D),XP(a)
- Refutation
- K(c);N_SPINP(b),P-FLIGHT,P_SPINP(g),XR(H)
- Try
- R(I);P_PINS(e),XP(g)
- Threat
- QAB1(D),XP(a)
- Vars
- S(d);N_GUARD::S(G)
- Refutation
- B(i);N_SPINS(e),XR(I)
- Try
- R(I);
- Vars
- S(d);N_GUARD,XR(I)::S(G)
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(e);N_GUARD::QAB1(D),XP(a)
- Refutation
- P(g);XS(G)
- Try
- R(I);
- Vars
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(e);N_GUARD::QAB1(D),XP(a)
- Refutation
- P(g);XS(G)
- Try
- R(I);
- Vars
- S(d);N_GUARD,XR(I)::S(G)
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(e);N_GUARD::QAB1(D),XP(a)
- Refutation
- P(g);XS(G)
- Try
- R(I);
- Vars
- S(e);N_GUARD,XR(I)::QAB1(D),XP(a)
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(e);N_GUARD::QAB1(D),XP(a)
- Refutation
- P(g);XS(G)
- Try
- R(I);XB(i)
- Threat
- R1(I)
- Vars
- S(e);N_GUARD,XR(I)::QAB1(D),XP(a)
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Refutation
- Q(j);XR(I)
- Try
- Q(D);
- Vars
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- Refutation
- K(c);P_SPINS(e),S_FLIGHT,XS(G)
- Try
- Q(D);CHECK
- Refutation
- S(e);XQ(D)
- Try
- Q(D);
- Vars
- S(d);XQ(D)::S(G),XS(d)
- P(g);P_SPINS(e),XS(G)::QAB1(D),XP(a)
- S(e);N_GUARD::QAB1(D),XP(a)
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- S(d);N_GUARD::QAR1(D)
- S(d);N_GUARD::QAR1(D),XS(d)
- Refutation
- K(c);P_SPINS(e),S_FLIGHT,XS(G)
- Try
- Q(D);CHECK
- Vars
- K(c);P_SPINS(e),S_FLIGHT,XS(G)::B(A),XP(b)
- Refutation
- S(e);P_SPINS(e)
- Try
- Q(D);XS(d)
- Threat
- S(G)
- Vars
- P(g);P_SPINS(e),XS(G)::QAB1(D),XP(a)
- S(e);N_GUARD::QAB1(D),XP(a)
- Refutation
- S(e);
- Try
- Actual
- Q(D);
- Vars
- K(c);P_SPINS(e),S_FLIGHT,XS(G)::B(A),XP(b)
- S(d);N_GUARD,XQ(D)::S(G)
- P(g);P_SPINS(e),XS(G)::QAB1(D),XP(a)
- S(e);N_GUARD::QAB1(D),XP(a)
- Q(j);N_GUARD,P_PINR(H)::S(G),XQ(j)
- Q(j);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(d);N_GUARD::S(G)
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