MESON Chess Problem Database

Problem Display
PID: 83639 (2n2n2/p1pp1N2/5R2/QP1k2p1/3p3b/Nb6/4PB2/1B5K w - - 0 1)

Ellerman, Arnoldo

O Football, 1936

2n2n2/p1pp1N2/5R2/QP1k2p1/3p3b/Nb6/4PB2/1B5K

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.b6#
    • 1...Se6
      • 2.Rf5#
    • 1...c5
      • 2.bxc5 ep#
    • 1...c6
      • 2.bxc6#
  • Tries
    • 1.Be4+?
      • 1...Kc5
        • 2.b6#
      • 1...Kxe4!
    • 1.Qc3?
      • threat
        • 2.Qxd4#
      • 1...dxc3
        • 2.e4#
      • 1...d3
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qxd3#
      • 1...Se6
        • 2.Rf5#
      • 1...c5
        • 2.Qf3#
      • 1...Bxf2!
    • 1.e4+?
      • 1...Kc5
        • 2.b6#
      • 1...dxe4 ep!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qxd4#
      • 1...Kc5
        • 2.Qxd4#
      • 1...Bxf2
        • 2.Qxg5#
      • 1...Se6
        • 2.Rf5#
      • 1...d3
        • 2.Qxd3#
      • 1...c5
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);P-FLIGHT,P_SPINP(b)::QAR(F)+P(G)
    • S(j);SBLOCK::R(H)
    • P(g);OGATE::QAR(F)+P(G),XP(g),EP
    • P(g);OGATE::QAR(F)+P(G),XP(g)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(b)::QAR(F)+P(G)
      • Refutation
        • K(d);S_FLIGHT,XB(A)
    • Try
      • Q(F);
      • Threat
        • QAR1(F),XP(b)
      • Vars
        • P(b);N_GUARD,XQ(F)::P(C)
        • S(j);SBLOCK::R(H)
        • P(g);SBLOCK::QAB(F)
      • Refutation
        • B(c);XB(D)
    • Try
      • P(C);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(b)::QAR(F)+P(G)
      • Refutation
        • P(b);EP,XP(C)
  • Actual
    • Q(F);P_PINP(b)
    • Threat
      • QAR1(F),XP(b)
    • Vars
      • K(d);P-FLIGHT::QAB1(F),XP(b)
      • B(c);N_GUARD,XB(D)::QAR(F),XP(e)
      • S(j);SBLOCK::R(H)
      • P(b);OGATEB::QAR2(F),XP(b)
      • P(g);SBLOCK::P(C)
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