MESON Chess Problem Database

Problem Display
PID: 278742 (1n1N1B2/5P1K/8/1p1kpQ2/4p3/1P1b4/3R1P1p/3rR1bq w - - 0 1)

Cristoffanini, Guido

Western Morning News, 1928

(First published on Sat Jan 21 1928)

1n1N1B2/5P1K/8/1p1kpQ2/4p3/1P1b4/3R1P1p/3rR1bq

#2

9 + 10

15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Qd7#
    • 1...Sc6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...e3
      • 2.Qxd3#
  • Tries
    • 1.Rxd3+?
      • 1...exd3
        • 2.Qxe5#
      • 1...Rxd3!
    • 1.Qg6?
      • threat
        • 2.Qd6#
      • 1...e3
        • 2.Qxd3#
      • 1...Kd4!
  • Keys
    • 1.f4!
      • threat
        • 2.Qxe5#
      • 1...Kd4
        • 2.Qxe5#
      • 1...exf4 ep
        • 2.Qe4#
      • 1...Sc6
        • 2.Qd7#
      • 1...Bd4
        • 2.Qe6#
      • 1...Sd7
        • 2.Qxd7#
      • 1...e3
        • 2.Qxd3#

This is a version of 277855

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(j);N_GUARD::QAR2(E)
    • S(j);N_GUARD::QAR2(E),XS(j)
    • P(f);OGATE,P_PINQ(E)::QAR2(E),XB(e)
  • Tries
    • Try
      • R(B);CHECK,XB(e)
      • Vars
        • P(f);XR(B)::QAR1(E),XP(i)
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(E);N_PINP(i)
      • Threat
        • QAR1(E)
      • Vars
        • P(f);OGATE,P_PINQ(E)::QAR2(E),XB(e)
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • P(C);
    • Threat
      • QAR1(E),XP(i)
    • Vars
      • K(h);N_SPINP(i),P-FLIGHT::QAB1(E),XP(i)
      • P(f);EP,P_PINQ(E),S_CUTQ(c),XP(C)::QAB1(E)
      • S(j);N_GUARD::QAR2(E)
      • B(b);N_SPINB(e),SBLOCK::QAB1(E)
      • S(j);N_GUARD::QAR2(E),XS(j)
      • P(f);OGATE,P_PINQ(E)::QAR2(E),XB(e)
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