MESON Chess Problem Database

Problem Display
PID: 183494 (n1R5/1Bpk3n/3N3N/4Q3/2P4b/K4b2/8/8 w - - 0 1)

Elmgren, Bertil Ernst

Lunds Dagblad, 1948

n1R5/1Bpk3n/3N3N/4Q3/2P4b/K4b2/8/8

#2

7 + 6

136 Problem Observer 2016

SOLUTION

  • SOUND
  • Sets
    • 1...cxd6
      • 2.Qe8#
  • Tries
    • 1.Sdf5?
      • threat
        • 2.Qe8#
      • 1...Be7+
        • 2.Qxe7#
      • 1...Bh5
        • 2.Qd5#
      • 1...Sf6
        • 2.Qe7#
      • 1...Bd8!
    • 1.Sdf7?
      • threat
        • 2.Qe8#
      • 1...Bd8
        • 2.Rxd8#
      • 1...Sf6
        • 2.Rd8#
      • 1...Be7+!
    • 1.Shf5?
      • threat
        • 2.Qe8#
      • 1...Be7
        • 2.Qxe7#
      • 1...Sf6
        • 2.Qe7#
      • 1...Bh5!
    • 1.Rd8+?
      • 1...Kxd8
        • 2.Qe8#
      • 1...Bxd8!
    • 1.c5?
      • threat
        • 2.Qe8#
      • 1...Bh5
        • 2.c6#
      • 1...Be7
        • 2.Qf5#
      • 1...Sf6!
  • Keys
    • 1.Shf7!
      • threat
        • 2.Qe8#
      • 1...Be7
        • 2.Qf5#
      • 1...Sf6
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK,XS(D)::QAB1(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(C)
      • Vars
        • B(b);CHECK,N_GUARD::QAR1(C),XB(b)
        • B(a);N_GUARD::QAR2(C)
        • S(e);S_CUTB(b)::QAR1(C)
      • Refutation
        • B(b);
    • Try
      • S(D);
      • Threat
        • QAB1(C)
      • Vars
        • B(b);N_GUARD::R1(G),XB(b)
        • S(e);S_CUTB(b)::R1(G)
      • Refutation
        • B(b);CHECK
    • Try
      • S(E);
      • Threat
        • QAB1(C)
      • Vars
        • B(b);N_GUARD,P_PINS(D)::QAR1(C),XB(b)
        • S(e);S_CUTB(b)::QAR1(C)
      • Refutation
        • B(a);
    • Try
      • R(G);CHECK
      • Vars
        • K(d);P-FLIGHT,XR(G)::QAR1(C)
      • Refutation
        • B(b);XR(G)
    • Try
      • P(B);
      • Threat
        • QAB1(C)
      • Vars
        • B(a);N_GUARD::P(B)
        • B(b);SBLOCK::QAB(C)
      • Refutation
        • S(e);
  • Actual
    • S(E);
    • Threat
      • QAB1(C)
    • Vars
      • B(b);P_PINS(D),SBLOCK::QAB(C)
      • S(e);S_CUTB(b)::R1(G)
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