MESON Chess Problem Database

Problem Display
PID: 11515 (2Q2n2/3q3r/2N2Rp1/6pp/K5kp/5R2/2NBB3/3b4 w - - 0 1)

Neale, Harry R

Chess, 1939

2Q2n2/3q3r/2N2Rp1/6pp/K5kp/5R2/2NBB3/3b4

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Se5#
    • 1...Qe6
      • 2.Se5#
    • 1...Qxc8
      • 2.Se5#
    • 1...Bxc2+
      • 2.Rb3#
    • 1...Bxe2
      • 2.Se3#
  • Tries
    • 1.Bxd1?
      • threat
        • 2.Se3#
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#
        • 2.Re3#
      • 1...Re7
        • 2.Re3#
      • 1...Qf5
        • 2.Se3#
        • 2.Se5#
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#
      • 1...h3!
    • 1.Qxd7+?
      • 1...Rxd7
        • 2.Se5#
      • 1...Se6
        • 2.Se5#
        • 2.Qxe6#
      • 1...Sxd7!
  • Keys
    • 1.Be1!
      • threat
        • 2.Rg3#
      • 1...Bxc2+
        • 2.Rb3#
      • 1...Bxe2
        • 2.Se3#
      • 1...Qf5
        • 2.Se5#
      • 1...h3
        • 2.R3f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(g);::S(F)
    • Q(g);N_SPINQ(g),XQ(H)::S(F)
    • B(a);CHECK,N_GUARD,P_PINS(F),XS(A)::B(C)+R(D)
    • B(a);N_PINS(A),P_PINS(F),XB(C)::S(A)
  • Tries
    • Try
      • B(C);N_SPINS(A),P_SPINS(F),XB(a)
      • Threat
        • DUALS(6)
      • Vars
        • R(h);::B(C)+R(D)
      • Refutation
        • P(c);
    • Try
      • Q(H);CHECK,XQ(g)
      • Vars
        • R(h);XQ(H)::S(F)
      • Refutation
        • S(i);XQ(H)
  • Actual
    • B(B);
    • Threat
      • B(C)+R(D),DCHECK
    • Vars
      • B(a);CHECK,N_GUARD,P_PINS(F),XS(A)::B(C)+R(D)
      • B(a);N_PINS(A),P_PINS(F),XB(C)::S(A)
      • Q(g);::S(F)
      • P(c);SBLOCK::B(C)+R(D),DCHECK
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