MESON Chess Problem Database

Problem Display
PID: 53494 (2N5/2ppp2R/K1k5/2b2Q2/5N2/n7/8/7b w - - 0 1)

Dobbs, Gilbert S

The Chess Review, 1934

2N5/2ppp2R/K1k5/2b2Q2/5N2/n7/8/7b

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bd6
      • 2.Sa7#
    • 1...d6
      • 2.Sxe7#
    • 1...e5
      • 2.Qxd7#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sd8#
        • 2.Qxc5#
      • 1...d5
        • 2.Sd8#
      • 1...d6
        • 2.Sd8#
      • 1...Bd5
        • 2.Sd8#
      • 1...Bg1
        • 2.Sd8#
      • 1...Bf2
        • 2.Sd8#
      • 1...Be3
        • 2.Sd8#
      • 1...Bb4
        • 2.Sd4#
        • 2.Sd8#
      • 1...Bd4
        • 2.Sxd4#
        • 2.Sd8#
      • 1...Bb6
        • 2.Sd8#
      • 1...Bd6
        • 2.Sd4#
        • 2.Sd8#
        • 2.Sa7#
      • 1...Ba7
        • 2.Sd8#
      • 1...dxe6!
    • 1.Sxe7+?
      • 1...Kd6
        • 2.Qf6#
      • 1...Bxe7!
    • 1.Rh6+?
      • 1...Bd6
        • 2.Sa7#
        • 2.Sxe7#
      • 1...d6
        • 2.Sxe7#
      • 1...e6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qxc5#
      • 1...e5
        • 2.Qxd7#
      • 1...Bd5
        • 2.Se5#
      • 1...Bg1
        • 2.Sb4#
      • 1...Bf2
        • 2.Sb4#
      • 1...Be3
        • 2.Sb4#
      • 1...Bb4
        • 2.Sxb4#
      • 1...Bd4
        • 2.Sb4#
      • 1...Bb6
        • 2.Sb4#
      • 1...Bd6
        • 2.Sa7#
      • 1...Ba7
        • 2.Sb4#
      • 1...d5
        • 2.Se5#
      • 1...d6
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(B),XB(a)
    • B(c);N_GUARD,SBLOCK::S(E)
    • P(f);SBLOCK,S_CUTB(c)::S(E),XP(g)
    • P(g);::QAB1(B),XP(f)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::S(A)
        • B(a);::S(A)
        • B(c);::S(A)
      • Refutation
        • P(f);XS(A)
    • Try
      • S(E);CHECK,XP(g)
      • Vars
        • K(d);P-FLIGHT::QAR2(B)
      • Refutation
        • B(c);XS(E)
    • Try
      • R(D);CHECK
      • Vars
        • P(f);P_SPINP(f)::S(E),XP(g)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • S(A);
    • Threat
      • QAR1(B),XB(c)
    • Vars
      • P(g);::QAB1(B),XP(f)
      • B(a);SBLOCK::S(A)
      • B(c);N_GUARD::S(A)
      • B(c);N_GUARD::S(A),XB(c)
      • B(c);N_GUARD,SBLOCK::S(E)
      • P(f);SBLOCK::S(A)
      • P(f);SBLOCK,S_CUTB(c)::S(E),XP(g)
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