MESON Chess Problem Database

Problem Display
PID: 87416 (3K4/8/1p1k1p2/1PpppP2/8/8/2R1R3/3Q4 w - - 0 1)

Alaikov, Venelin

4th HM., Problemista, 1966

3K4/8/1p1k1p2/1PpppP2/8/8/2R1R3/3Q4

#2

6 + 6

6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qa1?
      • 1...c4
        • 2.Qa3#
      • 1...e4
        • 2.Qxf6#
      • 1...d4!
    • 1.Qc1?
      • 1...c4
        • 2.Qa3#
      • 1...e4
        • 2.Qf4#
      • 1...d4!
    • 1.Qe1?
      • 1...c4
        • 2.Qb4#
      • 1...e4
        • 2.Qg3#
      • 1...d4!
    • 1.Qg1?
      • 1...e4
        • 2.Qh2#
        • 2.Qg3#
      • 1...c4
        • 2.Qxb6#
      • 1...d4!
    • 1.Qh1?
      • 1...e4
        • 2.Qh2#
      • 1...d4
        • 2.Qc6#
      • 1...c4!
    • 1.Qd2?
      • 1...c4
        • 2.Qb4#
      • 1...e4
        • 2.Qf4#
      • 1...d4!
    • 1.Qd3?
      • 1...c4
        • 2.Qa3#
      • 1...e4
        • 2.Qg3#
      • 1...d4!
  • Keys
    • 1.Qd4!
      • 1...cxd4
        • 2.Rc6#
      • 1...exd4
        • 2.Re6#
      • 1...c4
        • 2.Qxb6#
      • 1...e4
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);N_PINP(b)
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(c);OGATE::QAR2(A),XP(f)
      • Refutation
        • P(b);
    • Try
      • Q(A);N_PINP(b)
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);N_PINP(b)
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);N_PINP(b)
      • Vars
        • P(a);OGATE::QAR2(A),XP(d)
      • Refutation
        • P(b);
    • Try
      • Q(A);N_PINP(b)
      • Vars
        • P(c);OGATEB::QAB(A)
        • P(b);OGATE::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • P(a);N_SPINP(b),OGATE,XQ(A)::R1(B)
      • P(c);N_SPINP(b),OGATE,XQ(A)::R1(C)
      • P(a);OGATE::QAR2(A),XP(d)
      • P(c);OGATE::QAR2(A),XP(f)
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