MESON Chess Problem Database

Problem Display
PID: 283796 (8/8/1Qp5/8/2kpK3/8/2P5/7R w - - 0 1)

Lukashev, Viktor Sergeevich

Kudesnik, 2006

8/8/1Qp5/8/2kpK3/8/2P5/7R

#2

4 + 3

6490 yacpdb 2026

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qb3#
  • Tries
    • 1.Rb1?
      • threat
        • 2.Qxd4#
        • 2.Qb4#
        • 2.Qxc6#
      • 1...d3
        • 2.Qd4#
        • 2.Qb4#
        • 2.Qxc6#
      • 1...c5
        • 2.Qb3#
      • 1...Kc3!
    • 1.Rd1?
      • 1...Kc3
        • 2.Qb3#
      • 1...c5
        • 2.Qb3#
      • 1...d3!
    • 1.Rh2?
      • 1...Kc3
        • 2.Qxd4#
        • 2.Qb3#
      • 1...c5
        • 2.Qb3#
      • 1...d3!
    • 1.Rh3?
      • 1...c5
        • 2.Qb3#
      • 1...d3!
    • 1.Rh5?
      • threat
        • 2.Rc5#
        • 2.Qxd4#
        • 2.Qc5#
        • 2.Qb3#
      • 1...d3
        • 2.Rc5#
        • 2.Qd4#
        • 2.Qc5#
        • 2.Qb3#
      • 1...c5
        • 2.Rxc5#
        • 2.Qxc5#
        • 2.Qb3#
      • 1...Kc3!
    • 1.Rh6?
      • threat
        • 2.Rxc6#
      • 1...c5
        • 2.Qb3#
      • 1...Kc3!
  • Keys
    • 1.Rc1!
      • 1...Kc3
        • 2.Qxd4#
      • 1...d3
        • 2.cxd3#
      • 1...c5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(D)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(D)
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Threat
        • DUALS(4)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • R(A),XP(c)
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAB1(D),XP(b)
      • P(b);OGATE::R(A)+P(B)DCHECK,XP(b)
      • P(c);SBLOCK::QAB1(D)
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