MESON Chess Problem Database

Problem Display
PID: 75171 (R4Qbb/r6p/N7/8/1NP5/8/2Kn4/k1B5 w - - 0 1)

Junio, Noel Ferrer

a8Q, 2007

(First published on Mon Jan 8 2007)

R4Qbb/r6p/N7/8/1NP5/8/2Kn4/k1B5

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa6
      • 2.Rxa6#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Rd7
      • 2.Sc7#
    • 1...Re7
      • 2.Sc7#
    • 1...Rf7
      • 2.Sc7#
    • 1...Rg7
      • 2.Sc7#
      • 2.Bb2#
      • 2.Qf6#
    • 1...Bf7
      • 2.Qxh8#
    • 1...Bb2
      • 2.Bxb2#
    • 1...Bf6
      • 2.Qxf6#
  • Tries
    • 1.Qg7+?
      • 1...Rxg7
        • 2.Sc7#
        • 2.Bb2#
      • 1...Bxg7!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Rxa7#
      • 1...Ra2+
        • 2.Rxa2#
      • 1...Rxa8
        • 2.Qxa8#
      • 1...Bxc4
        • 2.Qxh8#
      • 1...Sxc4
        • 2.Sb3#
      • 1...Ra3
        • 2.Rxa3#
      • 1...Ra4
        • 2.Rxa4#
      • 1...Ra5
        • 2.Rxa5#
      • 1...Ra6
        • 2.Rxa6#
      • 1...Bb2
        • 2.Bxb2#
      • 1...Sb1
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 6
  • Sets
    • R(c);OGATE,P_SPINR(c),XS(E)::R(F),XR(c)
    • R(c);P_PINP(D)::R(F)+S(E),XR(c)
    • R(c);::R(F)+S(E)
    • B(e);OGATE::QAB(G),XB(f)
    • B(f);N_GUARD::B(A),XB(f)
    • B(f);N_GUARD::QAB(G),XB(f)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • B(f);XQ(G)
  • Actual
    • S(E);P_PINR(c)
    • Threat
      • R(F),XR(c)
    • Vars
      • R(c);CHECK,OGATE::R1(F),XR(c)
      • R(c);N_SPINR(c),OGATE,XR(F)::QAB(G),XR(c)
      • B(e);OGATE,XP(D)::QAB(G),XB(f)
      • S(b);N_GUARD,XP(D)::S(E)
      • R(c);OGATE::R(F),XR(c)
      • B(f);N_GUARD::B(A),XB(f)
      • S(b);N_GUARD::S(E)
      • S(b);N_GUARD::S(E),XS(b)
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