MESON Chess Problem Database

Problem Display
PID: 10070 (6K1/5QBp/8/5p2/p1PN1N2/P1kP3r/1p4bR/1r2R3 w - - 0 1)

Whyatt, William Albert

5th HM., The Sun-Herald, 1961

6K1/5QBp/8/5p2/p1PN1N2/P1kP3r/1p4bR/1r2R3

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Rc2#
    • 1...Bh1
      • 2.Rc2#
    • 1...Bf3
      • 2.Rc2#
    • 1...Be4
      • 2.Rc2#
    • 1...Bd5
      • 2.Rc2#
    • 1...Bc6
      • 2.Rc2#
    • 1...Bb7
      • 2.Rc2#
    • 1...Ba8
      • 2.Rc2#
  • Tries
    • 1.Qxf5?
      • threat
        • 2.Qa5#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Kd2
        • 2.Qa5#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...Rh5!
    • 1.Qc7?
      • threat
        • 2.Qa5#
      • 1...Bd5+
        • 2.cxd5#
      • 1...Kd2
        • 2.Qa5#
      • 1...Rxd3!
    • 1.Qe7?
      • threat
        • 2.Qb4#
      • 1...Kd2
        • 2.Qb4#
      • 1...Bd5+!
    • 1.Qf8?
      • threat
        • 2.Qb4#
      • 1...Kd2
        • 2.Qb4#
      • 1...Bd5+!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb4#
      • 1...Bd5+
        • 2.Sde6#
      • 1...Kd2
        • 2.Qb4#
      • 1...Bxb7
        • 2.Rc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(c);OGATE::R1(B)
    • B(c);OGATE,P_PINQ(H)::R1(B)
  • Tries
    • Try
      • Q(H);XP(g)
      • Threat
        • QAB(H)
      • Vars
        • B(c);CHECK,N_GUARD::S(G),XB(c)
        • K(d);P_SPINB(c),S_FLIGHT::QAB(H)
        • R(e);OGATE,XP(D)::QAR1(H),XR(e)
      • Refutation
        • R(e);
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • B(c);CHECK,OGATE::QAR(H)+P(E),XB(c)
        • K(d);P_SPINB(c),S_FLIGHT::QAB(H)
      • Refutation
        • R(e);XP(D)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • K(d);P_SPINB(c),S_FLIGHT::QAB(H)
      • Refutation
        • B(c);CHECK
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • K(d);P_SPINB(c),S_FLIGHT::QAB(H)
      • Refutation
        • B(c);CHECK
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • B(c);CHECK::B(I)+S(F)
      • K(d);P_SPINB(c),S_FLIGHT::QAB(H)
      • B(c);OGATE,XQ(H)::R1(B)
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