MESON Chess Problem Database

Problem Display
PID: 186618 (3R4/7B/6R1/2K5/8/4BN1Q/3pkP1P/1n6 w - - 0 1)

Henry, S

Chess, 1959

3R4/7B/6R1/2K5/8/4BN1Q/3pkP1P/1n6

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Rxd2#
    • 1...Sc3
      • 2.Rxd2#
  • Tries
    • 1.Sd4+?
      • 1...Kd1
        • 2.Rg1#
        • 2.Qf1#
      • 1...Ke1
        • 2.Rg1#
      • 1...Kd3!
    • 1.Qf1+?
      • 1...Kxf3
        • 2.Rg3#
      • 1...Kxf1!
  • Keys
    • 1.Re6!
      • 1...Kd1
        • 2.Qf1#
      • 1...d1Q
        • 2.Bd4#
      • 1...d1S
        • 2.Bd3#
      • 1...d1B
        • 2.Bd4#
        • 2.Bd3#
      • 1...d1R
        • 2.Bd4#
      • 1...Sa3
        • 2.Rxd2#
      • 1...Sc3
        • 2.Rxd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R1(I),XP(b)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT::R(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(D)::R1(G)
      • Refutation
        • K(c);S_FLIGHT,XQ(E)
  • Actual
    • R(G);
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::QAR2(E)
      • P(b);SBLOCK::R(G)+B(C)
      • P(b);SBLOCK::B(H)
      • S(a);N_GUARD::R1(I),XP(b)
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