MESON Chess Problem Database

Problem Display
PID: 96665 (8/3p4/3Q2K1/8/4k3/5p1p/6Rn/2B3n1 w - - 0 1)

Riczu, Lajos

Problemas, 1971

8/3p4/3Q2K1/8/4k3/5p1p/6Rn/2B3n1

#2

4 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Rg4#
    • 1...Sg4
      • 2.Rxg4#
  • Tries
    • 1.Rxg1?
      • threat
        • 2.Re1#
      • 1...Sf1
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...f2!
    • 1.Rg3?
      • 1...Sf1
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...f2
        • 2.Re3#
      • 1...Se2!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Re5#
        • 2.Qd5#
      • 1...f2
        • 2.Qd5#
      • 1...Sg4
        • 2.Rxg4#
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::R(B)
    • S(b);N_GUARD::R(B),XS(b)
  • Tries
    • Try
      • R(B);XS(a)
      • Threat
        • R(B)
      • Vars
        • S(b);N_GUARD::R(B)
        • S(b);N_GUARD::R(B),XS(b)
      • Refutation
        • P(c);
    • Try
      • R(B);
      • Vars
        • S(b);N_GUARD::R(B)
        • S(b);N_GUARD::R(B),XS(b)
        • P(c);OGATE::R1(B)
      • Refutation
        • S(a);
  • Actual
    • R(B);
    • Threat
      • DUALS(2)
    • Vars
      • P(c);::QAB1(C)
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