MESON Chess Problem Database
Problem Display
PID: 64621 (KQ3b2/3Prnp1/p2r2R1/B3kpN1/3p1p2/5B2/8/8 w - - 0 1)
McAllister, George W
Good Companions (April), 1917
#2
7 + 10
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Rxd7
- 2.Re6#
- 1...Re8
- 2.Sxf7#
- 1...Sxg5
- 2.Qxd6#
- 1...Sh6
- 2.Qxd6#
- 1...Sd8
- 2.Qxd6#
- 1...Sh8
- 2.Qxd6#
- 1...d3
- 2.Bc3#
- 1...Re6
- Tries
- 1.Ka7?
- 1...Sxg5
- 2.Qxd6#
- 1...d3
- 2.Bc3#
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Re8
- 2.Sxf7#
- 1...Sh6
- 2.Qxd6#
- 1...Sd8
- 2.Qxd6#
- 1...Sh8
- 2.Qxd6#
- 1...Rxd7+!
- 1...Sxg5
- 1.Bh1?
- 1...Rxd7
- 2.Re6#
- 1...Sxg5
- 2.Qxd6#
- 1...d3
- 2.Bc3#
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Re8
- 2.Sxf7#
- 1...Sh6
- 2.Qxd6#
- 1...Sd8
- 2.Qxd6#
- 1...Sh8
- 2.Qxd6#
- 1...f3!
- 1...Rxd7
- 1.Bg2?
- 1...Rxd7
- 2.Re6#
- 1...Sxg5
- 2.Qxd6#
- 1...d3
- 2.Bc3#
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Re8
- 2.Sxf7#
- 1...Sh6
- 2.Qxd6#
- 1...Sd8
- 2.Qxd6#
- 1...Sh8
- 2.Qxd6#
- 1...f3!
- 1...Rxd7
- 1.Bc6?
- threat
- 2.Sf3#
- 1...Sxg5
- 2.Qxd6#
- 1...f3!
- threat
- 1.Bb7?
- threat
- 2.Sf3#
- 1...Sxg5
- 2.Qxd6#
- 1...f3!
- threat
- 1.Be1?
- 1...Rxd7
- 2.Re6#
- 1...Sxg5
- 2.Qxd6#
- 1...d3
- 2.Bc3#
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Re8
- 2.Sxf7#
- 1...Sh6
- 2.Qxd6#
- 1...Sd8
- 2.Qxd6#
- 1...Sh8
- 2.Qxd6#
- 1...a5!
- 1...Rxd7
- 1.Bd2?
- 1...Rxd7
- 2.Re6#
- 1...Sxg5
- 2.Qxd6#
- 1...d3
- 2.Bc3#
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Re8
- 2.Sxf7#
- 1...Sh6
- 2.Qxd6#
- 1...Sd8
- 2.Qxd6#
- 1...Sh8
- 2.Qxd6#
- 1...a5!
- 1...Rxd7
- 1.Bb4?
- 1...Rxd7
- 2.Re6#
- 1...Sxg5
- 2.Bxd6#
- 2.Qxd6#
- 1...d3
- 2.Bc3#
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Re8
- 2.Sxf7#
- 1...Sh6
- 2.Bxd6#
- 2.Qxd6#
- 1...Sd8
- 2.Bxd6#
- 2.Qxd6#
- 1...Sh8
- 2.Bxd6#
- 2.Qxd6#
- 1...a5!
- 1...Rxd7
- 1.Rxd6?
- threat
- 2.Re6#
- 1...Sxg5
- 2.Rxa6#
- 2.Rb6#
- 2.Rc6#
- 2.Rg6#
- 2.Rh6#
- 1...Re6
- 2.Rxe6#
- 1...d3
- 2.Bc3#
- 1...Sxd6!
- threat
- 1.Qc7?
- 1...Rxd7
- 2.Re6#
- 1...Sxg5
- 2.Qxd6#
- 1...d3
- 2.Bc3#
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Sh6
- 2.Qxd6#
- 1...Sd8
- 2.Qxd6#
- 1...Sh8
- 2.Qxd6#
- 1...Re8+!
- 1...Rxd7
- 1.Qb5+?
- 1...Rd5
- 2.Qe2#
- 2.Qxd5#
- 1...axb5!
- 1...Rd5
- 1.Ka7?
- Keys
- 1.Bc7!
- 1...Rxd7
- 2.Re6#
- 1...Sxg5
- 2.Bxd6#
- 1...d3
- 2.Qb2#
- 1...a5
- 2.Qb5#
- 1...Re6
- 2.Sxf7#
- 2.Rxe6#
- 1...Re8
- 2.Sxf7#
- 1...Sh6
- 2.Bxd6#
- 1...Sd8
- 2.Bxd6#
- 1...Sh8
- 2.Bxd6#
- 1...Rxd7
- 1.Bc7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(g);N_GUARD,XP(E)::R1(D)
- R(g);N_GUARD,P_PINQ(G)::S(C),XS(h)
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- S(h);N_GUARD::QAB1(G),XR(f)
- P(a);OGATEB::B(B)
- Tries
- Try
- K(F);P-FLIGHT,P_SPINP(E)
- Vars
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- P(a);OGATEB::B(B)
- R(g);N_GUARD,N_PINP(E)::S(C),XS(h)
- S(h);N_GUARD::QAB1(G),XR(f)
- Refutation
- R(g);CHECK,XP(E)
- Try
- B(A);
- Vars
- R(g);N_GUARD,XP(E)::R1(D)
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- P(a);OGATEB::B(B)
- R(g);N_GUARD,P_PINQ(G)::S(C),XS(h)
- S(h);N_GUARD::QAB1(G),XR(f)
- Refutation
- P(b);
- Try
- B(A);
- Vars
- R(g);N_GUARD,XP(E)::R1(D)
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- P(a);OGATEB::B(B)
- R(g);N_GUARD,P_PINQ(G)::S(C),XS(h)
- S(h);N_GUARD::QAB1(G),XR(f)
- Refutation
- P(b);
- Try
- B(A);
- Threat
- S(C)
- Vars
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- Refutation
- P(b);
- Try
- B(A);
- Threat
- S(C)
- Vars
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- Refutation
- P(b);
- Try
- B(B);
- Vars
- R(g);N_GUARD,XP(E)::R1(D)
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- P(a);OGATEB::B(B)
- R(g);N_GUARD,P_PINQ(G)::S(C),XS(h)
- S(h);N_GUARD::QAB1(G),XR(f)
- Refutation
- P(e);
- Try
- B(B);
- Vars
- R(g);N_GUARD,XP(E)::R1(D)
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- P(a);OGATEB::B(B)
- R(g);N_GUARD,P_PINQ(G)::S(C),XS(h)
- S(h);N_GUARD::QAB1(G),XR(f)
- Refutation
- P(e);
- Try
- B(B);
- Vars
- R(g);N_GUARD,XP(E)::R1(D)
- P(a);OGATEB::B(B)
- R(g);N_GUARD,P_PINQ(G)::S(C),XS(h)
- Refutation
- P(e);
- Try
- R(D);XR(f)
- Threat
- QAB(G)+R(D),DCHECK
- Vars
- R(g);::QAB(G)+R(D),DCHECK,XR(g)
- P(a);OGATEB::B(B)
- Refutation
- S(h);P_SPINS(h),XR(D)
- Try
- Q(G);
- Vars
- R(g);N_GUARD,XP(E)::R1(D)
- S(h);N_GUARD,XS(C)::QAB1(G),XR(f)
- P(a);OGATEB::B(B)
- S(h);N_GUARD::QAB1(G),XR(f)
- Refutation
- R(g);CHECK
- Try
- Q(G);CHECK,N_PINR(f)
- Refutation
- P(e);XQ(G)
- Try
- Actual
- B(B);
- Vars
- R(g);N_GUARD,XP(E)::R1(D)
- S(h);N_GUARD,XS(C)::B(B),XR(f)
- P(a);OGATEB::QAB(G)
- P(e);N_GUARD::QAR(G)
- R(g);N_GUARD,P_PINQ(G)::S(C),XS(h)
- S(h);N_GUARD::B(B),XR(f)
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