MESON Chess Problem Database

Problem Display
PID: 232767 (bn3N1K/5p2/5pN1/3qrk2/Q1R4R/7r/7b/2B5 w - - 0 1)

Hoy, Paul

Freie Presse, 1969

bn3N1K/5p2/5pN1/3qrk2/Q1R4R/7r/7b/2B5

#2

7 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Rh5#
    • 1...Rb3
      • 2.Rh5#
    • 1...Rc3
      • 2.Rh5#
    • 1...Rd3
      • 2.Rh5#
    • 1...Rhe3
      • 2.Rh5#
    • 1...Rf3
      • 2.Rh5#
    • 1...Rxh4+
      • 2.Sxh4#
  • Tries
    • 1.Rf4+?
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Kg5!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Qg4#
      • 1...Rxh4+
        • 2.Sxh4#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Qg2
        • 2.Se7#
      • 1...Qf3
        • 2.Se7#
      • 1...Qc4
        • 2.Se7#
      • 1...Qe4
        • 2.Se7#
      • 1...Qd1
        • 2.Se7#
      • 1...Qd4
        • 2.Se7#
      • 1...Rg3
        • 2.Qf4#
      • 1...Re4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD,N_PINR(D)::R(D)
    • R(b);CHECK,XR(D)::S(E),XR(b)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(a);OGATE,XR(C)::QAR1(B),XB(a)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • R(C);
    • Threat
      • QAB1(B)
    • Vars
      • R(b);CHECK,XR(D)::S(E),XR(b)
      • B(a);N_GUARD::QAR1(B),XB(a)
      • Q(c);P_SPINR(d)::S(E)
      • R(b);N_PINR(D),S_CUTB(a)::QAR1(B)
      • R(d);N_GUARD,P_SPINQ(c)::QAB1(B),XR(d)
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