MESON Chess Problem Database

Problem Display
PID: 195776 (3Q2K1/5rP1/3Bkp2/p3p2N/N1n1P3/3n4/b2q4/8 w - - 0 1)

Rodda, WM

Western Daily Mercury, 1918

(First published on Sat Feb 2 1918)

3Q2K1/5rP1/3Bkp2/p3p2N/N1n1P3/3n4/b2q4/8

#2

7 + 9

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Qxf6#
    • 1...Re7
      • 2.Qxe7#
    • 1...Rxg7+
      • 2.Sxg7#
    • 1...Rf8+
      • 2.gxf8S#
    • 1...Sc1
      • 2.Sc5#
    • 1...Se1
      • 2.Sc5#
    • 1...Sdb2
      • 2.Sc5#
    • 1...Sf2
      • 2.Sc5#
    • 1...Sb4
      • 2.Sc5#
    • 1...Sf4
      • 2.Sc5#
    • 1...Sc5
      • 2.Sxc5#
  • Tries
    • 1.Qe8+?
      • 1...Re7
        • 2.Qxe7#
      • 1...Kxd6!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Qd5#
      • 1...Rxg7+
        • 2.Sxg7#
      • 1...Rxf8+
        • 2.gxf8S#
      • 1...Rd7
        • 2.Qxf6#
      • 1...Sc1
        • 2.Sc5#
      • 1...Se1
        • 2.Sc5#
      • 1...Sdb2
        • 2.Sc5#
      • 1...Sf2
        • 2.Sc5#
      • 1...Sb4
        • 2.Sc5#
      • 1...Sf4
        • 2.Sc5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Scb2
        • 2.Qd6#
      • 1...Sa3
        • 2.Qd6#
      • 1...Se3
        • 2.Qd6#
      • 1...Sb6
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(i);N_GUARD,SBLOCK::QAR1(F),XP(h)
    • R(i);N_GUARD::QAR1(F),XR(i)
    • R(i);CHECK,XP(E)::S(C),XR(i)
    • R(i);CHECK,OGATE::PXR(i)=S
    • S(c);N_GUARD::S(A)
    • S(c);N_GUARD::S(A),XS(c)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR1(F),XR(i)
      • Refutation
        • K(g);P-FLIGHT,XB(D)
  • Actual
    • B(D);
    • Threat
      • QAB1(F)
    • Vars
      • R(i);CHECK,XP(E)::S(C),XR(i)
      • R(i);CHECK,OGATE,XB(D)::PXR(i)=S
      • R(i);N_GUARD,SBLOCK::QAR1(F),XP(h)
      • S(c);N_GUARD::S(A)
      • S(c);N_GUARD::S(A),XS(c)
      • S(d);N_GUARD::QAR1(F)
      • S(d);N_GUARD::QAR1(F),XS(d)
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