MESON Chess Problem Database

Problem Display
PID: 259550 (3B4/3B1p2/1r2q1NK/5k2/2Np1p2/5QbP/7n/7b w - - 0 1)

Merzlyasov, IM

Vecherni Moskva, 1933

(First published on Wed Nov 22 1933)

3B4/3B1p2/1r2q1NK/5k2/2Np1p2/5QbP/7n/7b

#2

7 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sd6#
    • 1...Rb2
      • 2.Sd6#
    • 1...Rb3
      • 2.Sd6#
    • 1...Rb4
      • 2.Sd6#
    • 1...Rb5
      • 2.Sd6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rb7
      • 2.Sd6#
    • 1...Rb8
      • 2.Sd6#
    • 1...Be1
      • 2.Qxf4#
    • 1...Bf2
      • 2.Qxf4#
    • 1...Bh4
      • 2.Qxf4#
    • 1...Sg4+
      • 2.hxg4#
    • 1...d3
      • 2.Se3#
    • 1...f6
      • 2.Se7#
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe5#
      • 1...Sg4+
        • 2.hxg4#
      • 1...Rb5
        • 2.Sd6#
      • 1...Be4
        • 2.Qh5#
      • 1...Sf3
        • 2.Qd3#
      • 1...f3
        • 2.Qd3#
      • 1...f6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • R(g);N_GUARD::S(C)
    • R(g);N_GUARD::S(C),XR(g)
    • B(c);N_GUARD::QAR1(A),XP(e)
    • S(b);CHECK,OGATE::P(B),XS(b)
    • P(d);N_GUARD::S(C)
    • P(i);N_PINS(D),SBLOCK::S(D)
  • Actual
    • Q(A);N_PINP(e)
    • Threat
      • QAR1(A)
    • Vars
      • S(b);CHECK,OGATE::P(B),XS(b)
      • R(g);N_GUARD::S(C)
      • B(a);SBLOCK::QAR2(A)
      • S(b);S_CUTB(a)::QAB(A)
      • P(e);S_CUTB(a)::QAB(A)
      • P(i);N_PINS(D),SBLOCK::S(D)
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