MESON Chess Problem Database

Problem Display
PID: 18816 (1B2B3/8/N2NP2R/r1pkp3/p2P4/7p/8/2K3Qb w - - 0 1)

Ellerman, Arnoldo

5th Comm., Probleemblad, 1958

1B2B3/8/N2NP2R/r1pkp3/p2P4/7p/8/2K3Qb

#2

9 + 7

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Sb4#
    • 1...exd4
      • 2.Qg5#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Qd2#
      • 1...cxd4
        • 2.Qxa5#
      • 1...exd4
        • 2.Rh5#
      • 1...Be4
        • 2.Qxe4#
      • 1...e4!
    • 1.Qf1?
      • threat
        • 2.Qc4#
      • 1...exd4
        • 2.Qf5#
      • 1...c4
        • 2.Qxc4#
      • 1...Kxd4!
    • 1.Qxh1+?
      • 1...e4
        • 2.Qxe4#
      • 1...Kxd4!
    • 1.Qg5?
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Qd2#
      • 1...cxd4!
    • 1.Qg7?
      • threat
        • 2.Qxe5#
      • 1...cxd4
        • 2.Qb7#
      • 1...exd4
        • 2.Qg5#
      • 1...e4
        • 2.Qe5#
      • 1...Kxd4!
    • 1.e7?
      • threat
        • 2.Sc7#
      • 1...cxd4
        • 2.Qg8#
      • 1...exd4
        • 2.Qg5#
      • 1...Rxa6!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Qd2#
      • 1...cxd4
        • 2.Qa2#
      • 1...exd4
        • 2.Sc7#
      • 1...e4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD::S(D)
    • P(g);OGATEB,SBLOCK,XP(C)::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(g)
      • Vars
        • K(f);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
        • P(e);OGATEB,SBLOCK,XP(C)::QAR(B),XR(d)
        • P(g);OGATEB,SBLOCK,XP(C)::R(G)
        • B(a);N_GUARD::QAB1(B),XB(a)
      • Refutation
        • P(g);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(g);OGATEB,SBLOCK,XP(C)::QAR2(B)
        • P(e);::QAB1(B),XP(e)
      • Refutation
        • K(f);P-FLIGHT,XP(C)
    • Try
      • Q(B);CHECK,XB(a)
      • Vars
        • P(g);P_SPINP(g)::QAB1(B),XP(g)
      • Refutation
        • K(f);P-FLIGHT,XP(C)
    • Try
      • Q(B);P_PINP(g)
      • Threat
        • QAR1(B),XP(g)
      • Vars
        • K(f);N_SPINP(g),OGATEB,P-FLIGHT,XP(C)::QAR2(B)
      • Refutation
        • P(e);XP(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(g)
      • Vars
        • P(e);SBLOCK,XP(C)::QAB(B)
        • P(g);OGATEB,SBLOCK,XP(C)::QAR(B)
        • P(g);::QAR1(B)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(g),XP(C)
    • Try
      • P(F);
      • Threat
        • S(D)
      • Vars
        • P(e);SBLOCK,XP(C)::QAB(B)
        • P(g);OGATEB,SBLOCK,XP(C)::QAR(B)
      • Refutation
        • R(d);XS(D)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(g)
    • Vars
      • K(f);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
      • P(e);N_GUARD,SBLOCK,XP(C)::QAB(B)
      • P(g);SBLOCK,XP(C)::S(D)
      • P(g);::QAR1(B)
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