MESON Chess Problem Database

Problem Display
PID: 60810 (8/2Q5/2P2q2/1K1NN2p/2Pk2bR/5p2/3n1r2/1BbR2Bn w - - 0 1)

Dobbs, Gilbert S

Good Companions (November), 1915

8/2Q5/2P2q2/1K1NN2p/2Pk2bR/5p2/3n1r2/1BbR2Bn

#2

10 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Qb6#
      • 2.Qa7#
    • 1...Qg5
      • 2.Sxf3#
    • 1...Qe7
      • 2.Sxf3#
    • 1...Qg7
      • 2.Sxf3#
    • 1...Qd8
      • 2.Sxf3#
    • 1...Qh8
      • 2.Sxf3#
    • 1...Qxc6+
      • 2.Sxc6#
    • 1...Qd6
      • 2.Sxf3#
    • 1...Qe6
      • 2.Sxf3#
    • 1...Qg6
      • 2.Sxf3#
    • 1...Qh6
      • 2.Sxf3#
    • 1...Bb2
      • 2.Rxd2#
    • 1...Ba3
      • 2.Rxd2#
    • 1...Sg3
      • 2.Bxf2#
  • Tries
    • 1.Rxg4+?
      • 1...Qf4
        • 2.Sxf3#
        • 2.Rxf4#
      • 1...hxg4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Sxf3#
      • 1...Qxc6+
        • 2.Sxc6#
      • 1...Kxe5
        • 2.Qxf6#
      • 1...Qxe5
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(i);N_GUARD::S(H),XP(e)
    • Q(i);CHECK,XP(I)::S(H),XQ(i)
    • B(a);N_GUARD::R(B),XS(c)
    • S(b);N_GUARD::B(C),XR(d)
  • Tries
    • Try
      • R(E);CHECK,XB(g)
      • Refutation
        • P(h);XR(E)
  • Actual
    • Q(J);
    • Threat
      • S(H),XP(e)
    • Vars
      • Q(i);CHECK,XP(I)::QAB(J)+S(H),DCHECK,XQ(i)
      • K(f);N_SPINB(g),N_SPINR(d),N_SPINS(c),OGATEB,P_SPINQ(i),S_FLIGHT,XS(H)::QAB1(J),XQ(i)
      • Q(i);P_PINS(G),P_SPINQ(i),SBLOCK,XS(H)::QAB(J)
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