MESON Chess Problem Database

Problem Display
PID: 139219 (bB2B3/3N1Kp1/2k5/2n2N2/1R6/1p3rr1/5b2/7Q w - - 0 1)

Ellerman, Arnoldo

L'Echiquier, 1932

bB2B3/3N1Kp1/2k5/2n2N2/1R6/1p3rr1/5b2/7Q

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sb6#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Se7#
      • 1...Kd5
        • 2.Se7#
        • 2.Sb6#
      • 1...Sxd7!
    • 1.Qxf3+?
      • 1...Se4
        • 2.Se7#
        • 2.Qxe4#
      • 1...Rxf3!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Sf6#
      • 1...Kd5
        • 2.Sb6#
      • 1...Rc3
        • 2.Se7#
      • 1...Rd3
        • 2.Se7#
      • 1...Re3
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(f);S_FLIGHT::S(D)
  • Tries
    • Try
      • B(F);N_SPINS(C)
      • Threat
        • S(C)
      • Refutation
        • S(e);P_SPINS(e),XS(D)
    • Try
      • Q(A);CHECK,N_SPINS(C),XR(c)
      • Refutation
        • R(d);P_PINS(C),XQ(A)
  • Actual
    • Q(A);N_PINR(c),P_PINS(e)
    • Threat
      • B(G)+S(D)
    • Vars
      • K(f);N_SPINS(e),S_FLIGHT::S(D)
      • R(c);N_PINS(C),N_SPINS(e)::S(C)
      • R(c);N_PINS(C)::S(C)
      • R(c);N_PINS(C),S_CUTB(a)::QAR1(A),XS(e)
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