MESON Chess Problem Database

Problem Display
PID: 96661 (8/2p2p2/7R/4k3/7N/5K2/8/3Q4 w - - 0 1)

Riczu, Lajos

Problemas, 1969

8/2p2p2/7R/4k3/7N/5K2/8/3Q4

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qd6#
    • 1...c6
      • 2.Qd6#
  • Tries
    • 1.Ke3?
      • threat
        • 2.Qd4#
      • 1...c5
        • 2.Qd6#
      • 1...f6!
    • 1.Rc6?
      • 1...f5
        • 2.Sg6#
      • 1...f6!
    • 1.Rd6?
      • threat
        • 2.Qd4#
        • 2.Qd5#
      • 1...c5
        • 2.Qd5#
      • 1...c6
        • 2.Qd4#
      • 1...cxd6!
    • 1.Rf6?
      • 1...c5
        • 2.Qd6#
      • 1...c6
        • 2.Qd6#
      • 1...Kxf6!
  • Keys
    • 1.Qd7!
      • 1...c5
        • 2.Qd6#
      • 1...c6
        • 2.Qd6#
      • 1...f5
        • 2.Re6#
      • 1...f6
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • R(D);
      • Vars
        • P(c);N_GUARD,SBLOCK::S(C)
      • Refutation
        • P(c);
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(A)
        • P(b);::QAB1(A)
      • Refutation
        • P(b);XR(D)
    • Try
      • R(D);
      • Vars
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
  • Actual
    • Q(A);
    • Vars
      • P(b);N_GUARD::QAB1(A)
      • P(c);N_GUARD::R1(D)
      • P(c);N_GUARD,SBLOCK::S(C)
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