MESON Chess Problem Database

Problem Display
PID: 65125 (3r3r/4p3/pP4B1/p2R1b2/2PNq3/K2kB2Q/R2NpP2/8 w - - 0 1)

Ellerman, Arnoldo

4th Prize=, Good Companions (February), 1922

3r3r/4p3/pP4B1/p2R1b2/2PNq3/K2kB2Q/R2NpP2/8

#2

11 + 9

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Sxe2#
    • 1...Qxe3
      • 2.Qxe3#
    • 1...Qxd4
      • 2.Bh6#
    • 1...Bd7
      • 2.Sb5#
  • Tries
    • 1.Kb2?
      • threat
        • 2.Ra3#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Qxd4+!
    • 1.Bh6+?
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Bxh3!
    • 1.Rb2?
      • threat
        • 2.Rb3#
      • 1...Kc3
        • 2.Sxe2#
        • 2.Rb3#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Qxd4
        • 2.Bh6#
      • 1...a4!
  • Keys
    • 1.Ka4!
      • threat
        • 2.Ra3#
      • 1...Bd7+
        • 2.Sb5#
      • 1...Kc3
        • 2.Sxe2#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Qxd4
        • 2.Bh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::S(H),XP(a)
    • Q(c);OGATE,P_SPINB(e),P_SPINQ(c),XB(E)::QAR1(F),XQ(c)
    • Q(c);N_GUARD,P_SPINB(e),P_SPINQ(c),XS(H)::QAR(F)+B(E)
    • B(e);P_SPINQ(c),S_CUTR(h)::R(I)+S(H)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • R(A)
      • Vars
        • Q(c);OGATE,P_SPINB(e),P_SPINQ(c),XB(E)::QAR1(F),XQ(c)
      • Refutation
        • Q(c);CHECK,P_SPINB(e),P_SPINQ(c),XS(H)
    • Try
      • B(E);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINB(e),P_SPINQ(c)::QAR2(F),XQ(c)
        • Q(c);N_GUARD,P_SPINB(e),P_SPINQ(c)::QAR1(F),XQ(c)
      • Refutation
        • B(e);P_SPINQ(c),XQ(F)
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • Q(c);OGATE,P_SPINB(e),P_SPINQ(c),XB(E)::QAR1(F),XQ(c)
        • Q(c);N_GUARD,P_SPINB(e),P_SPINQ(c),XS(H)::QAR(F)+B(E)
      • Refutation
        • P(d);
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • R(A)
    • Vars
      • B(e);CHECK,P_SPINQ(c),S_CUTR(h)::R(I)+S(H)
      • K(b);P-FLIGHT::S(H),XP(a)
      • Q(c);OGATE,P_SPINB(e),P_SPINQ(c),XB(E)::QAR1(F),XQ(c)
      • Q(c);N_GUARD,P_PINP(G),P_SPINB(e),P_SPINQ(c),XS(H)::QAR(F)+B(E)
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