MESON Chess Problem Database

Problem Display
PID: 46037 (8/8/7K/6P1/5pk1/8/5P2/2Q2B2 w - - 0 1)

Nikitin, Vladimir V

Uralski Problemist, 2002

8/8/7K/6P1/5pk1/8/5P2/2Q2B2

#2

5 + 2

5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qxf4#
  • Tries
    • 1.Kg6?
      • 1...Kh4
        • 2.Qxf4#
      • 1...f3
        • 2.Qc4#
      • 1...Kf3!
    • 1.Qe3?
      • threat
        • 2.Qh3#
      • 1...Kh4
        • 2.Qxf4#
        • 2.Qh3#
      • 1...Kf5
        • 2.Bh3#
      • 1...f3
        • 2.Qe4#
      • 1...fxe3!
    • 1.Qc2?
      • 1...Kf3
        • 2.Qe2#
      • 1...f3
        • 2.Qe4#
      • 1...Kh4!
    • 1.Qc4?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kh4
        • 2.Qxf4#
      • 1...Kf5!
    • 1.Qc8+?
      • 1...Kh4
        • 2.Qh3#
      • 1...Kf3!
  • Keys
    • 1.Qe1!
      • 1...Kf3
        • 2.Qe2#
      • 1...Kh4
        • 2.f3#
      • 1...Kf5
        • 2.Bh3#
      • 1...f3
        • 2.Qe4#

Anticipated by 156393(1948), 132863(1972)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(A),XP(a)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XP(a)
        • P(a);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);S_FLIGHT::B(B)
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(A)
        • K(b);P-FLIGHT::QAR2(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);P-FLIGHT::QAB(A)+P(C)
      • K(b);S_FLIGHT::B(B)
      • P(a);OGATEB::QAR2(A)
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