MESON Chess Problem Database

Problem Display
PID: 73507 (2B3K1/5N1n/5kp1/8/6p1/p3Rqp1/5Q2/7R w - - 0 1)

Shajgarovski, Svetlin Ivanov

Freie Presse, 1993

2B3K1/5N1n/5kp1/8/6p1/p3Rqp1/5Q2/7R

#2

6 + 7

6113 Problemschach-Jahrbuch (1993) 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qf5
      • 2.Re6#
    • 1...a2
      • 2.Qb2#
    • 1...g5
      • 2.Rh6#
  • Tries
    • 1.Rxf3+?
      • 1...Ke7
        • 2.Re1#
        • 2.Re3#
        • 2.Qe1#
        • 2.Qe3#
        • 2.Qe2#
      • 1...gxf3!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qa1#
      • 1...Qxf1
        • 2.Rxf1#
      • 1...g5
        • 2.Rh6#
      • 1...Qf2
        • 2.Qa6#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qf5
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);OGATE::QAR2(B),XQ(b)
    • Q(b);::R1(C)
    • P(a);N_GUARD::QAB(B)
    • P(f);OGATEB::R(A)
  • Tries
    • Try
      • R(C);CHECK,XQ(b)
      • Refutation
        • P(d);P_SPINP(d),XR(C)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • Q(b);N_SPINQ(b),OGATE,XQ(B)::R(A),XQ(b)
      • P(f);OGATEB::R(A)
      • Q(b);N_GUARD::QAR(B)
      • Q(b);OGATE::QAR2(B),XQ(b)
      • Q(b);::R1(C)
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