MESON Chess Problem Database

Problem Display
PID: 18665 (8/7Q/4p3/2R3K1/3pp3/3k4/3rb3/2B1R2N w - - 0 1)

Whyatt, William Albert

1st Prize, Olympic Ty., 1957

8/7Q/4p3/2R3K1/3pp3/3k4/3rb3/2B1R2N

#2

6 + 6

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qh3#
    • 1...Rd1
      • 2.Sf2#
    • 1...Ra2
      • 2.Sf2#
    • 1...Rb2
      • 2.Sf2#
    • 1...Rc2
      • 2.Sf2#
    • 1...Bd1
      • 2.Qxe4#
    • 1...Bf1
      • 2.Qxe4#
    • 1...Bg4
      • 2.Qxe4#
    • 1...Bh5
      • 2.Qxe4#
  • Tries
    • 1.Qh2?
      • 1...Ke3
        • 2.Qg3#
        • 2.Qxe2#
        • 2.Qh3#
      • 1...Bf3
        • 2.Qxd2#
      • 1...Rd1
        • 2.Sf2#
        • 2.Qxe2#
      • 1...Ra2
        • 2.Sf2#
      • 1...Rb2
        • 2.Sf2#
      • 1...Rc2
        • 2.Sf2#
      • 1...Bd1
        • 2.Qxd2#
      • 1...Bf1
        • 2.Qxd2#
      • 1...Bg4
        • 2.Qxd2#
      • 1...Bh5
        • 2.Qxd2#
      • 1...e3
        • 2.Qh7#
      • 1...e5!
    • 1.Qh3+?
      • 1...e3
        • 2.Sf2#
        • 2.Qh7#
      • 1...Bf3!
    • 1.Qb7?
      • threat
        • 2.Qb3#
      • 1...Rb2
        • 2.Sf2#
      • 1...Rc2
        • 2.Sf2#
      • 1...Bd1
        • 2.Qxe4#
        • 2.Qa6#
        • 2.Qb5#
      • 1...e3
        • 2.Qh7#
      • 1...Ke3!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qa3#
      • 1...Ke3
        • 2.Rc3#
      • 1...Ra2
        • 2.Sf2#
      • 1...Rb2
        • 2.Sf2#
      • 1...Rc2
        • 2.Sf2#
      • 1...Bd1
        • 2.Qa6#
      • 1...e3
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(c);N_SPINP(e),P-FLIGHT,P_SPINB(b),P_SPINR(a)::QAR(F)
    • R(a);::S(C)
    • B(b);::QAB1(F),XP(e)
  • Tries
    • Try
      • Q(F);N_PINP(e)
      • Vars
        • B(b);OGATE::QAR1(F),XR(a)
        • R(a);::S(C)
        • P(e);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • P(f);
    • Try
      • Q(F);CHECK,N_PINP(e)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAR2(F)
      • Vars
        • R(a);::S(C)
        • P(e);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(c);P-FLIGHT,P_SPINB(b),P_SPINR(a)
  • Actual
    • Q(F);N_PINP(e)
    • Threat
      • QAR(F)
    • Vars
      • K(c);P-FLIGHT,P_SPINB(b),P_SPINR(a)::R(D)
      • R(a);::S(C)
      • B(b);::QAB(F)
      • P(e);OGATEB,SBLOCK::QAB(F)
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