MESON Chess Problem Database

Problem Display
PID: 238506 (7n/2n5/p7/Np5Q/p3k2p/2RpB1b1/8/3N1K2 w - - 0 1)

Basisty, Mark Borisovich

Novitski, Petr Adrinovich

Variantim, 2020

7n/2n5/p7/Np5Q/p3k2p/2RpB1b1/8/3N1K2

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Rc4#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sd2#
      • 1...bxc4
        • 2.Rxc4#
      • 1...Be1
        • 2.Sd6#
      • 1...d2
        • 2.Sxd2#
      • 1...Be5!
    • 1.Rc5?
      • threat
        • 2.Qf5#
      • 1...Be5
        • 2.Rxe5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Bf4!
  • Keys
    • 1.Rxd3!
      • threat
        • 2.Rd4#
      • 1...Kxd3
        • 2.Qf5#
      • 1...Be5
        • 2.Sf2#
      • 1...Se6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(f);N_GUARD::R(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • P(f);OGATE,XS(E)::R(C),XP(f)
        • B(b);N_GUARD::S(E)
        • P(a);::S(E),XP(a)
      • Refutation
        • B(b);
    • Try
      • R(C);
      • Threat
        • QAB1(F)
      • Vars
        • B(b);N_GUARD::R1(C),XB(b)
        • S(h);N_GUARD::QAB1(F),XS(h)
      • Refutation
        • B(b);
  • Actual
    • R(C);XP(a)
    • Threat
      • R1(C)
    • Vars
      • K(d);S_FLIGHT,XR(C)::QAB(F)
      • B(b);N_GUARD::S(A)
      • S(h);N_GUARD::QAB1(F)
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