MESON Chess Problem Database

Problem Display
PID: 139545 (6br/8/5K1k/7p/Q6n/8/8/8 w - - 0 1)

Nikitin, Vladimir V

Rochade Europa, 2010

6br/8/5K1k/7p/Q6n/8/8/8

#2

2 + 5

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh7
      • 2.Qf4#
    • 1...Bh7
      • 2.Qf4#
  • Tries
    • 1.Qg4?
      • threat
        • 2.Qg7#
      • 1...Kh7
        • 2.Qxh5#
        • 2.Qg7#
      • 1...Rh7
        • 2.Qf4#
        • 2.Qg5#
      • 1...Sf5
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...hxg4!
  • Keys
    • 1.Qe8!
      • 1...Kh7
        • 2.Qxh5#
      • 1...Ba2
        • 2.Qxh8#
      • 1...Rh7
        • 2.Qe3#
      • 1...Bb3
        • 2.Qxh8#
      • 1...Bc4
        • 2.Qxh8#
      • 1...Bd5
        • 2.Qxh8#
      • 1...Be6
        • 2.Qxh8#
      • 1...Bf7
        • 2.Qxh8#
      • 1...Bh7
        • 2.Qe3#
      • 1...Sg2
        • 2.Qg6#
      • 1...Sf3
        • 2.Qg6#
      • 1...Sf5
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#

Anticipated by 15848(1988), 221082(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::QAB(A)
    • B(d);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT::QAR2(A),XP(b)
      • B(d);OGATE::QAR2(A),XR(e)
      • R(e);SBLOCK::QAB(A)
      • B(d);SBLOCK::QAB(A)
      • S(a);N_GUARD::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
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