MESON Chess Problem Database

Problem Display
PID: 57440 (r3R3/1Qn5/1p6/3pB3/3Nk3/8/p7/Kb1RrN2 w - - 0 1)

Smith, Paul H

Chess Life, 1956

r3R3/1Qn5/1p6/3pB3/3Nk3/8/p7/Kb1RrN2

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Bxc7#
    • 1...Ra4
      • 2.Bxc7#
    • 1...Ra5
      • 2.Bxc7#
    • 1...Ra6
      • 2.Bxc7#
    • 1...Ra7
      • 2.Bxc7#
    • 1...Sb5
      • 2.Bb8#
      • 2.Qh7#
    • 1...Sa6
      • 2.Bb8#
      • 2.Qh7#
  • Tries
    • 1.Bh2+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qh7#
      • 1...Sxe8
        • 2.Qe7#
        • 2.Qh7#
      • 1...Rxe8!
    • 1.Bg3+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qh7#
      • 1...Sxe8
        • 2.Qe7#
        • 2.Qh7#
      • 1...Rxe8!
    • 1.Bd6+?
      • 1...Se6
        • 2.Rxe6#
        • 2.Qh7#
      • 1...Sxe8
        • 2.Qe7#
        • 2.Qh7#
      • 1...Rxe8!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Rxe1#
      • 1...Rxd1
        • 2.Qe2#
      • 1...Rxf1
        • 2.Qe2#
      • 1...Rxa6
        • 2.Bxc7#
      • 1...Sxa6
        • 2.Bb8#
      • 1...Re2
        • 2.Qxe2#
      • 1...Re3
        • 2.Sd2#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sb5
        • 2.Bb8#
      • 1...b5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD::R(G)+B(E),XS(g)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • R(h);XR(G)
    • Try
      • B(E);CHECK
      • Refutation
        • R(h);XR(G)
    • Try
      • B(E);CHECK
      • Refutation
        • R(h);XR(G)
  • Actual
    • Q(F);N_PINP(e)
    • Threat
      • R(B),XR(b)
    • Vars
      • R(b);N_GUARD,XR(B)::QAR2(F)
      • R(b);N_GUARD,XS(C)::QAR2(F)
      • R(h);N_GUARD,XQ(F)::R(G)+B(E),XS(g)
      • S(g);OGATE,XQ(F)::R(G)+B(E)
      • R(b);N_GUARD::QAR2(F),XR(b)
      • R(b);SBLOCK::S(C)
      • B(a);N_GUARD,P_PINR(B)::QAB1(F),XB(a)
      • S(g);OGATE::R(G)+B(E)
      • P(f);OGATE::QAB(F)
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