MESON Chess Problem Database

Problem Display
PID: 199568 (1r1nR3/1p2N1r1/2P3B1/2P1k2N/1pQ5/1P6/2K2p1b/6nq w - - 0 1)

Stewart, John

Stubbs, Arthur Goodwin

The Observer, 1945

(First published on Sun Dec 16 1945)

1r1nR3/1p2N1r1/2P3B1/2P1k2N/1pQ5/1P6/2K2p1b/6nq

#2

9 + 10

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4+
      • 2.Qxe4#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qxc6
      • 2.Sxc6#
    • 1...Sf3
      • 2.Qd5#
      • 2.Qe4#
    • 1...Sxc6
      • 2.Sxc6#
    • 1...Sf7
      • 2.Sc8#
    • 1...bxc6
      • 2.Sxc6#
  • Tries
    • 1.Sf5+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qxe6#
        • 2.Qd4#
      • 1...Re7!
    • 1.Sc8+?
      • 1...Se6
        • 2.Rxe6#
      • 1...Re7!
    • 1.Sg8+?
      • 1...Se6
        • 2.Rxe6#
      • 1...Re7!
    • 1.Be4?
      • threat
        • 2.Sg6#
        • 2.Qd5#
      • 1...Rxe7
        • 2.Qd5#
      • 1...bxc6
        • 2.Sxc6#
        • 2.Sg6#
      • 1...Rg6
        • 2.Sxg6#
        • 2.Qd5#
      • 1...Se6
        • 2.Qd5#
      • 1...Qxe4+!
    • 1.Qc3+?
      • 1...Ke6
        • 2.Sxg7#
        • 2.Qf6#
      • 1...bxc3!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Sxg7#
        • 2.Qf6#
      • 1...Kxd4!
    • 1.Qf4+?
      • 1...Ke6
        • 2.Sxg7#
        • 2.Qf5#
        • 2.Qf6#
      • 1...Bxf4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qd6#
      • 1...Ke6
        • 2.Qf5#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...Rxg6
        • 2.Sxg6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Sf7
        • 2.Sc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
    • Q(b);N_GUARD::QAR1(C),XQ(b)
    • Q(b);XP(F)::R(I)+S(H),DCHECK,XQ(b)
    • S(j);XP(F)::R(I)+S(H),DCHECK,XS(j)
    • S(j);N_GUARD,S_CUTR(h)::R(I)+S(H)
    • P(g);XP(F)::R(I)+S(H),DCHECK,XP(g)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • S(H);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::R1(I),XS(j)
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • S(H);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::R1(I),XS(j)
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • B(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);P_SPINR(h),XS(H)::QAR1(C)
        • S(j);::QAR1(C)
      • Refutation
        • Q(b);CHECK,XB(G)
    • Try
      • Q(C);CHECK
      • Refutation
        • P(e);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(f);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • B(d);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(f);P-FLIGHT::QAB1(C)
      • Q(b);P_PINP(D),XP(F)::R(I)+S(H),DCHECK,XQ(b)
      • R(h);XB(G)::R(I)+S(H),DCHECK,XR(h)
      • Q(b);N_GUARD,P_PINQ(C)::QAR1(C),XQ(b)
      • Q(b);N_GUARD::QAR1(C),XQ(b)
      • S(j);N_GUARD,S_CUTR(h)::R(I)+S(H)
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