MESON Chess Problem Database

Problem Display
PID: 245242 (3rN2R/N1pkP2R/1p3PP1/1q1n1KP1/Bp1Q4/2n1p3/8/b7 w - - 0 1)

Banny, Dimitry Nikolaevich

64 Shakhmatnoe obozrenie, 1976

3rN2R/N1pkP2R/1p3PP1/1q1n1KP1/Bp1Q4/2n1p3/8/b7

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Bxc6#
    • 1...Sb1
      • 2.Qxd5#
    • 1...Sd1
      • 2.Qxd5#
    • 1...Sa2
      • 2.Qxd5#
    • 1...Se2
      • 2.Qxd5#
  • Tries
    • 1.Bxb5+?
      • 1...c6
        • 2.Bxc6#
      • 1...Sxb5!
    • 1.Qe5?
      • threat
        • 2.Qe6#
      • 1...Sxe7+
        • 2.Rxe7#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...Sf4!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Ke5#
      • 1...Sf4+
        • 2.Kxf4#
      • 1...Sxf6+
        • 2.Kxf6#
      • 1...Sxe7+
        • 2.Kf4#
      • 1...Sxa4
        • 2.Ke4#
      • 1...Sb1
        • 2.Ke4#
      • 1...Sd1
        • 2.Ke4#
      • 1...Sa2
        • 2.Ke4#
      • 1...Se2
        • 2.Ke4#
      • 1...Se4
        • 2.Kxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE::B(A),XQ(e)
    • S(b);N_GUARD::QAR2(B),XS(f)
  • Tries
    • Try
      • B(A);CHECK,XQ(e)
      • Vars
        • P(h);P_SPINP(h)::B(A),XP(h)
      • Refutation
        • S(b);XB(A)
    • Try
      • Q(B);N_PINS(f)
      • Threat
        • QAB1(B)
      • Vars
        • S(f);CHECK,OGATE,P_PINQ(B),P_SPINS(f),XP(H)::R1(I),XS(f)
        • S(f);P_PINQ(B),XP(E)::S(J),XS(f)
      • Refutation
        • S(f);P_PINQ(B)
  • Actual
    • Q(B);N_PINS(f)
    • Threat
      • QAB(B)+K(C)
    • Vars
      • S(f);CHECK::QAB(B)+K(C),XS(f)
      • S(f);CHECK,XP(E)::QAB(B)+K(C),XS(f)
      • S(f);CHECK,P_SPINS(f),XP(H)::QAB(B)+K(C)
      • S(b);N_SPINQ(e),XB(A)::QAB(B)+K(C)
      • S(b);::QAB(B)+K(C)
      • S(b);::QAB(B)+K(C),XS(b)
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Developed and maintained by Brian Stephenson.
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