MESON Chess Problem Database

Problem Display
PID: 32551 (2N1B3/1p2P3/3p3n/3k1P2/1r1Bp3/4P3/1p6/1K1QN3 w - - 0 1)

Pearson, Arthur Cyril

The Westminster Papers, 1876

2N1B3/1p2P3/3p3n/3k1P2/1r1Bp3/4P3/1p6/1K1QN3

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Qxb3#
    • 1...Ra4
      • 2.Sb6#
    • 1...Rc4
      • 2.Sb6#
    • 1...Rxd4
      • 2.Qxd4#
    • 1...Rb6
      • 2.Sxb6#
    • 1...b5
      • 2.Sb6#
  • Tries
    • 1.Qb3+?
      • 1...Rc4
        • 2.Sb6#
      • 1...Rxb3!
  • Keys
    • 1.Qa4!
      • 1...Kc4
        • 2.Sb6#
      • 1...Rxa4
        • 2.Sb6#
      • 1...Rxd4
        • 2.Qb5#
        • 2.Qxd4#
      • 1...Sxf5
        • 2.Bf7#
      • 1...Rb3
        • 2.Qxb3#
      • 1...Rc4
        • 2.Sb6#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rb6
        • 2.Sxb6#
      • 1...Sg4
        • 2.Bf7#
      • 1...Sf7
        • 2.Bxf7#
      • 1...Sg8
        • 2.Bf7#
      • 1...b5
        • 2.Sb6#
      • 1...b6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::QAB(B),XR(b)
    • R(b);N_GUARD::S(H)
    • R(b);OGATE,P_SPINR(b),XB(E)::QAR1(B),XR(b)
    • R(b);N_GUARD::S(H),XR(b)
    • P(g);S_CUTR(b)::S(H)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(b);P_SPINR(b)::S(H)
      • Refutation
        • R(b);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(d);P_SPINR(b),S_FLIGHT::S(H)
      • R(b);N_GUARD,XQ(B)::S(H)
      • S(f);N_GUARD,XP(F)::B(I)
      • R(b);N_GUARD::QAB(B),XR(b)
      • R(b);N_GUARD::S(H)
      • R(b);N_GUARD::QAR2(B),XR(b)
      • R(b);N_GUARD::S(H),XR(b)
      • S(f);N_GUARD::B(I)
      • S(f);N_GUARD::B(I),XS(f)
      • P(g);S_CUTR(b)::S(H)
      • P(g);N_GUARD::QAB1(B)
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