MESON Chess Problem Database

Problem Display
PID: 250126 (1nb3Q1/2pN2R1/p2k1pR1/1BqNb2K/4P3/B7/1prrp3/8 w - - 0 1)

Levman, Semyon Semyonovich

Western Morning News, 1927

1nb3Q1/2pN2R1/p2k1pR1/1BqNb2K/4P3/B7/1prrp3/8

#2

9 + 12

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qxd5#
    • 1...Bh2
      • 2.Rxf6#
    • 1...Bc3
      • 2.Bxc5#
    • 1...Bg3
      • 2.Rxf6#
    • 1...Bf4
      • 2.Rxf6#
  • Tries
    • 1.Re7?
      • threat
        • 2.Re6#
        • 2.Qe6#
      • 1...axb5
        • 2.Qe6#
      • 1...Sc6
        • 2.Qe6#
      • 1...c6
        • 2.Qe6#
      • 1...Bxd7!
  • Keys
    • 1.S5xf6!
      • threat
        • 2.Se8#
      • 1...Bh2+
        • 2.Sd5#
      • 1...Bc3+
        • 2.Bxc5#
      • 1...Bg3+
        • 2.Sd5#
      • 1...Bd4+
        • 2.Qd5#
      • 1...Bf4+
        • 2.Sd5#
      • 1...Bxf6+
        • 2.e5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATE,XS(D)::QAR1(I),XR(c)
    • B(f);N_GUARD,P_PINS(D)::R(F),XP(i)
    • B(f);P_PINS(D),S_CUTR(b)::B(A),XQ(e)
  • Tries
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);XB(C)::QAR1(I)
        • S(k);::QAR1(I)
        • P(j);::QAR1(I)
      • Refutation
        • B(l);XS(G)
  • Actual
    • S(D);XP(i)
    • Threat
      • R(F)+S(D),DCHECK
    • Vars
      • B(f);CHECK,N_GUARD::R(F)+S(D)
      • B(f);CHECK,S_CUTR(b)::B(A),XQ(e)
      • B(f);CHECK,S_CUTR(c)::QAR1(I)
      • B(f);CHECK,OGATE,P_SPINB(f),XS(D)::P(B)
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