MESON Chess Problem Database

Problem Display
PID: 255568 (b7/7Q/1p3pp1/3pp3/1Ppk2P1/1PN5/4K3/2R3b1 w - - 0 1)

Basisty, Mark Borisovich

Problemist Ukraini, 2021

b7/7Q/1p3pp1/3pp3/1Ppk2P1/1PN5/4K3/2R3b1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qa7#
    • 1...g5
      • 2.Sb5#
  • Tries
    • 1.Qxg6?
      • threat
        • 2.Sb5#
      • 1...e4
        • 2.Qxf6#
      • 1...b5
        • 2.Sxb5#
      • 1...f5
        • 2.Qxb6#
      • 1...Bc6!
    • 1.Qh1?
      • threat
        • 2.Sb5#
        • 2.Qxg1#
      • 1...cxb3
        • 2.Sb5#
      • 1...Bf2
        • 2.Sb5#
        • 2.Qd1#
      • 1...Bh2
        • 2.Sb5#
        • 2.Qd1#
      • 1...Be3
        • 2.Sb5#
      • 1...Bc6
        • 2.Qxg1#
      • 1...b5
        • 2.Sxb5#
        • 2.Qxg1#
      • 1...e4!
    • 1.Qh3?
      • threat
        • 2.Rd1#
      • 1...cxb3
        • 2.Qd3#
      • 1...Be3
        • 2.Qxe3#
      • 1...e4!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxb6#
      • 1...cxb3
        • 2.Rd1#
      • 1...e4
        • 2.Sb5#
      • 1...b5
        • 2.Qb6#
        • 2.Qc5#
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(f);OGATEB::QAB(G)
    • P(h);::S(D)
  • Tries
    • Try
      • Q(G);XP(h)
      • Threat
        • S(D)
      • Vars
        • P(e);OGATEB::QAB(G),XP(g)
        • P(f);::S(D),XP(f)
        • P(g);OGATE::QAB(G),XP(f)
      • Refutation
        • B(i);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XP(C)::S(D)
        • B(a);::S(D)
        • B(i);::QAB(G),XB(a)
      • Refutation
        • P(e);
    • Try
      • Q(G);
      • Threat
        • R(A)
      • Vars
        • P(b);N_GUARD,XP(C)::QAR1(G)
        • B(a);N_GUARD::QAB1(G),XB(a)
      • Refutation
        • P(e);
  • Actual
    • Q(G);
    • Threat
      • QAB(G),XP(f)
    • Vars
      • P(b);XP(C)::R(A)
      • P(e);SBLOCK::S(D)
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