MESON Chess Problem Database

Problem Display
PID: 258830 (6kr/2p1p2p/5P1B/1PPbp2B/8/4P3/6p1/1QKR4 w - - 0 1)

Lipton, Michael

The Problemist Supplement, 2021

6kr/2p1p2p/5P1B/1PPbp2B/8/4P3/6p1/1QKR4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Rd8#
    • 1...Bb3
      • 2.Rd8#
    • 1...Bf3
      • 2.Rd8#
      • 2.f7#
    • 1...Bc4
      • 2.Rd8#
    • 1...Be4
      • 2.Rd8#
      • 2.f7#
    • 1...Bc6
      • 2.f7#
    • 1...Be6
      • 2.Rd8#
    • 1...Bb7
      • 2.Rd8#
      • 2.f7#
    • 1...Ba8
      • 2.Rd8#
      • 2.f7#
    • 1...e6
      • 2.f7#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qg4#
      • 1...Bxe4
        • 2.Rd8#
        • 2.f7#
      • 1...g1Q
        • 2.Rxg1#
      • 1...g1R
        • 2.Rxg1#
      • 1...Be6
        • 2.Rd8#
      • 1...Bf7!
    • 1.Qf5?
      • threat
        • 2.Qg4#
        • 2.Qc8#
        • 2.Qg5#
      • 1...exf6
        • 2.Qg4#
        • 2.Qc8#
      • 1...g1Q
        • 2.Qc8#
      • 1...g1R
        • 2.Qc8#
      • 1...Bf3
        • 2.Rd8#
        • 2.Qe6#
        • 2.Qc8#
        • 2.Qg5#
        • 2.f7#
      • 1...Be4
        • 2.Rd8#
        • 2.Qe6#
        • 2.Qc8#
        • 2.f7#
      • 1...Bc6
        • 2.Qg4#
        • 2.Qe6#
        • 2.Qg5#
        • 2.f7#
      • 1...Be6
        • 2.Rd8#
        • 2.Qxe6#
        • 2.Qg5#
      • 1...Bb7
        • 2.Rd8#
        • 2.Qg4#
        • 2.Qe6#
        • 2.Qg5#
        • 2.f7#
      • 1...e6
        • 2.Qg4#
        • 2.Qg5#
        • 2.f7#
      • 1...Bf7!
  • Keys
    • 1.Qa2!
      • 1...Bxa2
        • 2.Rd8#
      • 1...exf6
        • 2.Qxd5#
      • 1...g1Q
        • 2.Rxg1#
      • 1...g1S
        • 2.Rxg1#
      • 1...g1B
        • 2.Rxg1#
      • 1...g1R
        • 2.Rxg1#
      • 1...Bb3
        • 2.Rd8#
        • 2.Qxg2#
        • 2.Qa8#
      • 1...Bc4
        • 2.Rd8#
        • 2.Qxg2#
        • 2.Qa8#
      • 1...Be6
        • 2.Rd8#
        • 2.Qxe6#
      • 1...Bf7
        • 2.Bxf7#
        • 2.Rd8#
        • 2.Qxf7#
      • 1...e4
        • 2.Qxg2#
      • 1...c6
        • 2.Qa8#
      • 1...e6
        • 2.f7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • B(b);OGATE::R(C)
    • B(b);N_GUARD::P(H)
    • P(e);S_CUTB(b)::P(H)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(a);OGATEB,P_PINR(C)::R(C),XQ(a)
        • P(a);OGATEB,P_PINR(C)::R(C),XR(a)
        • B(b);OGATE::R(C)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(a);P_PINR(C)::QAR(A)
      • Refutation
        • B(b);
  • Actual
    • Q(A);P_PINB(b)
    • Vars
      • B(b);N_SPINB(b),OGATE,XQ(A)::R(C)
      • P(e);N_GUARD,XP(H)::QAB(A),XB(b)
      • P(a);OGATEB,P_PINR(C)::R(C),XQ(a)
      • P(a);OGATEB::R(C),XS(a)
      • P(a);OGATEB::R(C),XB(a)
      • P(a);OGATEB,P_PINR(C)::R(C),XR(a)
      • P(c);::QAR(A),XP(a)
      • P(d);::QAR(A)
      • P(e);N_SPINB(b),S_CUTB(b)::P(H)
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