MESON Chess Problem Database

Problem Display
PID: 120954 (8/8/6N1/8/3pk1K1/1Q2p3/8/8 w - - 0 1)

Stocchi, Ottavio

Magyar Sakkvilag, 1933

8/8/6N1/8/3pk1K1/1Q2p3/8/8

#2

3 + 3

6490 yacpdb 2009
3713 Snap 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qf3#
    • 1...d3
      • 2.Qc4#
  • Tries
    • 1.Qc2+?
      • 1...d3
        • 2.Qc4#
      • 1...Kd5!
    • 1.Qf7?
      • threat
        • 2.Qf5#
      • 1...e2
        • 2.Qf3#
      • 1...d3
        • 2.Qc4#
      • 1...Kd3!
    • 1.Qb5?
      • threat
        • 2.Qf5#
      • 1...d3
        • 2.Qc4#
        • 2.Qe5#
      • 1...e2!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qd5#
        • 2.Qe6#
      • 1...Ke5
        • 2.Qe6#
      • 1...d3
        • 2.Qd5#
      • 1...e2
        • 2.Qe6#

Anticipated by 202234(1923)

This anticipates 108152(1997)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE::QAB1(A)
    • P(b);OGATEB::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b)::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(a);::QAB1(A)
        • P(b);OGATEB::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • P(a);
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P-FLIGHT::QAR1(A)
      • P(b);::QAB1(A)
      • P(a);::QAR2(A)
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