MESON Chess Problem Database

Problem Display
PID: 11211 (8/1R3NN1/3p1p2/2pk4/3b4/2p2RP1/2Q5/K7 w - - 0 1)

Robinson, H

Chess, 1937

8/1R3NN1/3p1p2/2pk4/3b4/2p2RP1/2Q5/K7

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb3#
      • 2.Qa2#
  • Tries
    • 1.Rf5+?
      • 1...Kc4
        • 2.Sxd6#
        • 2.Qe2#
      • 1...Kc6
        • 2.Sd8#
      • 1...Be5!
    • 1.Qe4+?
      • 1...Kc4
        • 2.Sxd6#
      • 1...Kxe4!
    • 1.Qf5+?
      • 1...Kc4
        • 2.Sxd6#
      • 1...Kc6
        • 2.Sd8#
      • 1...Be5!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Rxc3#
      • 1...c2+
        • 2.Rc3#
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke4
        • 2.Rxc3#
      • 1...Kc6
        • 2.Rxf6#
      • 1...Bg1
        • 2.Rf4#
      • 1...Bf2
        • 2.Rf4#
      • 1...Be3
        • 2.Rf4#
      • 1...Be5
        • 2.Rf4#
      • 1...c4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(d);S_FLIGHT::S(F)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);P_SPINB(b),S_FLIGHT::S(F),XP(e)
      • Refutation
        • K(d);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);S_FLIGHT::S(F),XP(e)
        • K(d);S_FLIGHT::S(F)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(C),XP(a)
    • Vars
      • P(a);CHECK::QAB(B)+R(C)
      • K(d);S_FLIGHT::QAB(B)
      • K(d);S_FLIGHT::QAB(B)+R(C),XP(a)
      • K(d);S_FLIGHT::QAB(B)+R(C),XP(f)
      • B(b);::QAB(B)+R(C)
      • P(c);SBLOCK::QAB(B)+R(C),DCHECK
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