MESON Chess Problem Database

Problem Display
PID: 193799 (4R2n/K4pBb/2p5/p5p1/5k2/4NppB/2p5/2Q3b1 w - - 0 1)

Ellerman, Arnoldo

2nd Prize, Good Companions, 1916

4R2n/K4pBb/2p5/p5p1/5k2/4NppB/2p5/2Q3b1

#2

6 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Sd1#
      • 2.Sf1#
      • 2.Sxc2#
      • 2.Sg2#
      • 2.Sc4#
      • 2.Sd5#
      • 2.Sf5#
    • 1...Bxe3+
      • 2.Qxe3#
    • 1...Be4
      • 2.Be5#
    • 1...g4
      • 2.Bh6#
    • 1...c5
      • 2.Sg2#
      • 2.Sd5#
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qd6#
      • 1...Bxe3+
        • 2.Qxe3#
      • 1...f2
        • 2.Sg2#
      • 1...g4
        • 2.Bh6#
      • 1...Be4
        • 2.Be5#
      • 1...Sg6
        • 2.Qa4#
      • 1...c5
        • 2.Sd5#

This is a version of 61138

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,OGATE,P_SPINB(a),XS(B)::QAB1(A),XB(a)
    • B(j);SBLOCK::B(E)
    • P(g);OGATEB::B(E)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • B(a);CHECK,OGATE,XS(B)::QAB1(A),XB(a)
      • P(c);N_PINS(B)::S(B)
      • P(g);OGATEB::B(E)
      • B(j);SBLOCK::B(E)
      • S(k);S_CUTB(j)::QAR(A)
      • P(h);N_PINS(B)::S(B)
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