MESON Chess Problem Database

Problem Display
PID: 169300 (2K5/B6p/2k1B3/b2R4/8/1b6/2q5/2Q5 w - - 0 1)

Belchikov, Nikolai Ivanovich

Khramtsevich, Mikhail Nikolaevich

2nd HM., SuperProblem 186. TT, 2017

2K5/B6p/2k1B3/b2R4/8/1b6/2q5/2Q5

#2

5 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qxc5#
  • Tries
    • 1.Rc5+?
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Kd6!
    • 1.Qa3?
      • threat
        • 2.Qd6#
      • 1...Bxd5
        • 2.Bd7#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qh2
        • 2.Qc5#
      • 1...Bb4
        • 2.Qa6#
      • 1...Bc7!
    • 1.Qg5?
      • threat
        • 2.Bd7#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Qf5!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qd6#
      • 1...Bxd5
        • 2.Bd7#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qh2
        • 2.Rc5#
      • 1...Bb4
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE::QAR1(A),XQ(a)
  • Tries
    • Try
      • R(B);CHECK,N_PINQ(a)
      • Vars
        • Q(a);OGATE,P_SPINQ(a),XR(B)::QAR1(A),XQ(a)
      • Refutation
        • K(d);P-FLIGHT,P_PINR(B)
    • Try
      • Q(A);N_PINQ(a)
      • Threat
        • QAR1(A)
      • Vars
        • B(b);SBLOCK,XR(B)::B(C)
        • Q(a);N_GUARD::QAR1(A),XQ(a)
        • Q(a);N_GUARD::QAR1(A)
        • B(c);OGATE::QAR2(A)
      • Refutation
        • B(c);
    • Try
      • Q(A);N_PINQ(a)
      • Threat
        • B(C)
      • Vars
        • B(b);OGATE,XR(B)::QAB1(A),XB(b)
      • Refutation
        • Q(a);P_PINB(C)
  • Actual
    • Q(A);N_PINQ(a)
    • Threat
      • QAR1(A)
    • Vars
      • B(b);SBLOCK,XR(B)::B(C)
      • Q(a);N_GUARD::R1(B),XQ(a)
      • Q(a);N_GUARD::R1(B)
      • B(c);N_GUARD::QAR1(A)
      • B(c);N_GUARD::QAR1(A),XB(c)
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