MESON Chess Problem Database

Problem Display
PID: 264491 (1Q5b/8/8/8/8/K2B4/4n3/k6r w - - 0 1)

Chepizhni, Viktor Ivanovich

The Problemist, 1992

1Q5b/8/8/8/8/K2B4/4n3/k6r

#2

3 + 4

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qxb1#
    • 1...Rh2
      • 2.Qb1#
    • 1...Rh3
      • 2.Qb1#
    • 1...Rh4
      • 2.Qb1#
    • 1...Rh5
      • 2.Qb1#
    • 1...Rh6
      • 2.Qb1#
    • 1...Rh7
      • 2.Qb1#
    • 1...Bb2+
      • 2.Qxb2#
    • 1...Sc1
      • 2.Qb1#
    • 1...Sg1
      • 2.Qb1#
    • 1...Sc3
      • 2.Qb2#
    • 1...Sd4
      • 2.Qb2#
  • Tries
    • 1.Qxh8+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd4
        • 2.Qxd4#
        • 2.Qxh1#
      • 1...Rxh8!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qa2#
      • 1...Bb2+
        • 2.Qxb2#
      • 1...Sc1
        • 2.Qb1#
      • 1...Sc3
        • 2.Qb2#

This anticipates 166344(2016)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::QAR1(C),XR(b)
    • R(b);N_GUARD::QAR1(C)
    • R(b);N_GUARD,P_PINB(B)::QAR1(C)
    • B(d);CHECK,N_GUARD::QAB1(C),XB(d)
    • S(c);S_CUTR(b)::QAR1(C)
    • S(c);S_CUTB(d)::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK,XB(d)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(C),XS(c)
      • Refutation
        • R(b);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • B(d);CHECK,N_GUARD::QAB1(C),XB(d)
      • S(c);S_CUTR(b)::QAR1(C)
      • S(c);S_CUTB(d)::QAB1(C)
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