MESON Chess Problem Database

Problem Display
PID: 169313 (b7/8/8/4Q3/2B1qp2/3R4/2K1kp2/R7 w - - 0 1)

Mitroshin, Anatoly Anatolyovich

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Comm., SuperProblem 186. TT, 2017

b7/8/8/4Q3/2B1qp2/3R4/2K1kp2/R7

#2

5 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Rxe3#
    • 1...Qxe5
      • 2.Rda3#
      • 2.Rb3#
      • 2.Rc3#
      • 2.Rg3#
      • 2.Rh3#
  • Tries
    • 1.Qh5+?
      • 1...Qf3
        • 2.Rda3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rxf3#
      • 1...f3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qd2#
      • 1...Qxd3+
        • 2.Qxd3#
      • 1...Qxc4
        • 2.Rd2#
      • 1...Qe3
        • 2.Rxe3#
      • 1...f1S
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_PINR(C)::B(D)+R(C),DCHECK,XQ(c)
  • Tries
    • Try
      • Q(E);CHECK,N_PINQ(c)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • Q(E);N_PINQ(c)
    • Threat
      • QAR1(E)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XR(C)::QAB1(E),XQ(c)
      • Q(c);N_PINR(C),P_PINQ(E),XB(D)::R1(C)
      • Q(c);N_PINR(C)::B(D)+R(C),DCHECK,XQ(c)
      • P(b);N_GUARD::QAR1(E)
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