MESON Chess Problem Database

Problem Display
PID: 152760 (4R3/4N2B/2p2p2/K3prp1/1P2kP2/1QB5/P2pP3/3r4 w - - 0 1)

Ellerman, Arnoldo

Good Companions (December), 1915

4R3/4N2B/2p2p2/K3prp1/1P2kP2/1QB5/P2pP3/3r4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...exf4+
      • 2.Sd5#
      • 2.Sxf5#
  • Tries
    • 1.Bxd2?
      • threat
        • 2.Qc4#
        • 2.Qd3#
        • 2.Qe3#
      • 1...exf4+
        • 2.Sxf5#
      • 1...Kd4
        • 2.Qd3#
      • 1...gxf4
        • 2.Qc4#
        • 2.Qd3#
      • 1...Rc1
        • 2.Qd3#
        • 2.Qe3#
      • 1...Rxd2!
    • 1.Qd5+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxf4
        • 2.Qf3#
      • 1...cxd5!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qe3#
      • 1...exd4+
        • 2.Sd5#
      • 1...exf4+
        • 2.Sxf5#
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kxf4
        • 2.Qf3#
      • 1...gxf4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(d);CHECK,XP(F)::R(J)+S(H),XR(e)
        • K(c);N_SPINR(e),P-FLIGHT::QAR1(C)
      • Refutation
        • R(a);XB(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);N_SPINR(e),OGATE,P-FLIGHT::QAR1(C)
        • K(c);N_SPINR(e),OGATE,P-FLIGHT,XP(F)::QAR1(C)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • B(D);
    • Threat
      • QAR1(C)
    • Vars
      • P(d);CHECK,SBLOCK,XB(D)::R(J)+S(H)
      • P(d);CHECK,SBLOCK,XP(F)::R(J)+S(H),XR(e)
      • K(c);N_SPINR(e),P-FLIGHT,XB(D)::QAR1(C)
      • K(c);N_SPINR(e),P-FLIGHT,XP(F)::QAR1(C)
      • P(f);SBLOCK,XP(F)::QAB1(C)
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