MESON Chess Problem Database

Problem Display
PID: 263131 (5K2/3Np3/4k3/3bPp2/B7/8/8/2RQ4 w - - 0 1)

Nagovitsin, Eduard Nikolaevich

3rd Comm., SuperProblem, 2021

5K2/3Np3/4k3/3bPp2/B7/8/8/2RQ4

#2

6 + 4

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Rc6#
    • 1...Bb3
      • 2.Bxb3#
      • 2.Rc6#
      • 2.Qxb3#
    • 1...Bc6
      • 2.Rxc6#
    • 1...f4
      • 2.Qg4#
  • Tries
    • 1.Rc6+?
      • 1...Kxd7
        • 2.Qxd5#
      • 1...Bxc6!
    • 1.Qb3?
      • 1...Bc4
        • 2.Qxc4#
      • 1...f4
        • 2.Qh3#
      • 1...Bxb3!
    • 1.Qh5?
      • threat
        • 2.Qg6#
        • 2.Qf7#
        • 2.Qh6#
      • 1...Bh1
        • 2.Qf7#
      • 1...Ba2
        • 2.Qf7#
      • 1...Bg2
        • 2.Qf7#
      • 1...Bb3
        • 2.Qf7#
      • 1...Bf3
        • 2.Qf7#
      • 1...Bc4
        • 2.Qf7#
      • 1...Be4
        • 2.Qf7#
      • 1...Bb7
        • 2.Qf7#
      • 1...Ba8
        • 2.Qf7#
      • 1...f4
        • 2.Sc5#
        • 2.Qg4#
        • 2.Qg6#
        • 2.Qf7#
        • 2.Qh3#
      • 1...Bc6!
  • Keys
    • 1.Bb3!
      • threat
        • 2.Qxd5#
      • 1...Kxd7
        • 2.Qxd5#
      • 1...Bxb3
        • 2.Rc6#
      • 1...f4
        • 2.Qg4#
      • 1...Bc4
        • 2.Bxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::R(A)
    • B(a);N_GUARD::R(A),XB(a)
    • P(b);OGATEB::QAB(B)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(c);N_GUARD,P_SPINB(a),S_FLIGHT,XS(E)::QAR2(B),XB(a)
      • Refutation
        • B(a);XR(A)
    • Try
      • Q(B);P_PINB(a)
      • Vars
        • B(a);OGATEB::QAB(B),XB(a)
        • P(b);OGATEB::QAB(B)
      • Refutation
        • B(a);N_SPINB(a),XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);::QAB1(B)
      • Refutation
        • B(a);
  • Actual
    • B(C);P_PINB(a)
    • Threat
      • QAB1(B),XB(a)
    • Vars
      • K(c);S_FLIGHT,XS(E)::QAR2(B),XB(a)
      • B(a);N_SPINB(a),XB(C)::R(A)
      • P(b);OGATEB::QAB(B)
      • B(a);OGATEB::B(C),XB(a)
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