MESON Chess Problem Database

Problem Display
PID: 243103 (4K3/2p1p3/3k4/5R2/8/8/8/4Q3 w - - 0 1)

Armeni, Alberto

ChessStar, 2011

4K3/2p1p3/3k4/5R2/8/8/8/4Q3

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Qe5#
      • 2.Qxe7#
  • Tries
    • 1.Rc5?
      • threat
        • 2.Qe5#
        • 2.Qxe7#
      • 1...e5
        • 2.Qxe5#
      • 1...e6
        • 2.Qe5#
      • 1...Kxc5!
    • 1.Qd2+?
      • 1...Ke6
        • 2.Qd5#
        • 2.Qd7#
      • 1...Kc6!
    • 1.Qd1+?
      • 1...Ke6
        • 2.Qd5#
        • 2.Qd7#
      • 1...Kc6!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qd5#
      • 1...Kc6
        • 2.Qa6#
      • 1...Ke6
        • 2.Qd5#
        • 2.Qe5#
      • 1...c5
        • 2.Qb6#
      • 1...c6
        • 2.Qe5#
      • 1...e5
        • 2.Rf6#
      • 1...e6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAB1(A),XP(c)
        • P(c);::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);N_GUARD::QAR2(A)
      • P(b);SBLOCK::QAB1(A)
      • P(c);N_GUARD::R(B)
      • P(c);SBLOCK::QAB1(A)
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