MESON Chess Problem Database

Problem Display
PID: 172338 (3Q4/8/5p1K/7n/6pk/8/6R1/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

3Q4/8/5p1K/7n/6pk/8/6R1/8

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Rh2#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Rh2#
      • 1...Sf4
        • 2.Qg3#
      • 1...g3!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qxg4#
        • 2.Qh1#
      • 1...Kh3
        • 2.Qxg4#
        • 2.Qh1#
      • 1...Sf4
        • 2.Qxg4#
      • 1...Sg3
        • 2.Rh2#
      • 1...g3
        • 2.Qxh5#
      • 1...f5
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::R(A)
  • Tries
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • R(A)
      • Vars
        • S(c);N_GUARD::QAB1(C)
      • Refutation
        • P(a);
  • Actual
    • Q(C);N_PINP(d)
    • Threat
      • DUALS(2)
    • Vars
      • S(c);::QAR1(C),XP(a)
      • S(c);SBLOCK::R(A)
      • P(a);OGATE::QAR1(C),XS(c)
      • P(d);::QAR(C)
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