MESON Chess Problem Database

Problem Display
PID: 169293 (1b4QK/2p1R3/8/1p3pPB/1p2Nk1p/1p2p3/1B4P1/8 w - - 0 1)

Atayants, Grigory Sergeevich

3rd Comm., SuperProblem 189. TT, 2017

1b4QK/2p1R3/8/1p3pPB/1p2Nk1p/1p2p3/1B4P1/8

#2

8 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Bc1#
    • 1...h3
      • 2.g3#
    • 1...c5
      • 2.Qxb8#
    • 1...c6
      • 2.Qxb8#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Be5#
      • 1...e2
        • 2.Bc1#
      • 1...c5
        • 2.Qxb8#
      • 1...c6
        • 2.Qxb8#
      • 1...fxe4!
    • 1.Qxb8?
      • threat
        • 2.Qxc7#
      • 1...e2
        • 2.Bc1#
      • 1...fxe4!
    • 1.Qd8?
      • 1...e2
        • 2.Bc1#
        • 2.Qd2#
      • 1...Ba7
        • 2.Qxc7#
      • 1...h3
        • 2.g3#
      • 1...c5
        • 2.Qxb8#
      • 1...c6
        • 2.Qxb8#
      • 1...fxe4!
    • 1.Qf8?
      • 1...e2
        • 2.Bc1#
      • 1...h3
        • 2.g3#
      • 1...c5
        • 2.Qxb8#
      • 1...c6
        • 2.Qxb8#
      • 1...Ba7!
  • Keys
    • 1.Qc8!
      • 1...fxe4
        • 2.Qg4#
      • 1...e2
        • 2.Bc1#
      • 1...Ba7
        • 2.Qxc7#
      • 1...h3
        • 2.g3#
      • 1...c5
        • 2.Qxb8#
      • 1...c6
        • 2.Qxb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::B(A)
    • P(e);N_GUARD::P(B)
    • P(h);OGATEB::QAB(G),XB(i)
  • Tries
    • Try
      • B(E);
      • Threat
        • B(A)
      • Vars
        • P(b);OGATEB::B(A)
        • P(h);OGATEB::QAB(G),XB(i)
      • Refutation
        • P(g);XS(C)
    • Try
      • Q(G);P_PINP(h),XB(i)
      • Threat
        • QAB(G),XP(h)
      • Vars
        • P(b);OGATEB::B(A)
      • Refutation
        • P(g);XS(C)
    • Try
      • Q(G);
      • Vars
        • B(i);N_GUARD::QAB(G),XP(h)
        • P(e);N_GUARD::P(B)
        • P(h);OGATEB::QAB(G),XB(i)
      • Refutation
        • P(g);XS(C)
    • Try
      • Q(G);P_PINP(g)
      • Vars
        • P(b);OGATEB::B(A)
        • P(e);N_GUARD::P(B)
        • P(h);OGATEB::QAB(G),XB(i)
      • Refutation
        • B(i);
  • Actual
    • Q(G);
    • Vars
      • P(g);OGATE,XS(C)::QAR1(G)
      • P(b);OGATEB::B(A)
      • B(i);N_GUARD::QAB(G),XP(h)
      • P(e);N_GUARD::P(B)
      • P(h);OGATEB::QAB(G),XB(i)
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