MESON Chess Problem Database

Problem Display
PID: 249858 (nb1R4/4Q3/1PK1pP1q/1pBNkp1r/2b1P3/3p1RN1/6n1/8 w - - 0 1)

Nadezhdin, Nikolai Dmitrievich

Schach, 1987

nb1R4/4Q3/1PK1pP1q/1pBNkp1r/2b1P3/3p1RN1/6n1/8

#2

10 + 11

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.Qxf6#
    • 1...Rh1
      • 2.Rxf5#
    • 1...Rh2
      • 2.Rxf5#
    • 1...Rh3
      • 2.Rxf5#
    • 1...Rh4
      • 2.Rxf5#
    • 1...Bxd5+
      • 2.Rxd5#
    • 1...Bd6
      • 2.Qxd6#
    • 1...Ba7
      • 2.Qd6#
    • 1...Sc7
      • 2.Qd6#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Bd4#
      • 1...Bd5+
        • 2.Rxd5#
      • 1...Bd6!
    • 1.Sc7?
      • threat
        • 2.Bd4#
      • 1...Bd5+
        • 2.Rxd5#
      • 1...Qe3!
  • Keys
    • 1.exf5!
      • threat
        • 2.Qxe6#
      • 1...Bxd5+
        • 2.Rxd5#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Rxf5
        • 2.Rxf5#
      • 1...Sf4
        • 2.Re3#
      • 1...Sc7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(i);OGATE,XP(H)::QAB1(I),XQ(i)
    • R(g);N_GUARD::R1(A),XP(f)
    • B(c);CHECK,OGATE,XS(E)::R1(J),XB(c)
    • B(k);N_GUARD::QAB1(I),XB(k)
    • B(k);N_GUARD::QAB1(I)
    • S(j);S_CUTB(k)::QAB1(I)
  • Tries
    • Try
      • S(E);
      • Threat
        • B(D)
      • Vars
        • B(c);CHECK,N_GUARD::R1(J),XB(c)
      • Refutation
        • B(k);
    • Try
      • S(E);
      • Threat
        • B(D)
      • Vars
        • B(c);CHECK,N_GUARD::R1(J),XB(c)
      • Refutation
        • Q(i);
  • Actual
    • P(C);XP(f)
    • Threat
      • QAR1(I),XP(h)
    • Vars
      • B(c);CHECK,OGATE,XS(E)::R1(J),XB(c)
      • Q(i);OGATE,XP(H)::QAB1(I),XQ(i)
      • R(g);OGATE,XP(C)::R1(A),XR(g)
      • S(a);N_GUARD,S_CUTQ(i)::R(A)
      • S(j);S_CUTB(k)::QAB1(I)
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