MESON Chess Problem Database

Problem Display
PID: 146936 (8/rnpK4/2p1P2b/p6Q/1BkNR3/PNrq3R/2P1n3/5B2 w - - 0 1)

Ellerman, Arnoldo

Eskilstuna Kuriren, 1921

(First published on Sat Dec 3 1921)

8/rnpK4/2p1P2b/p6Q/1BkNR3/PNrq3R/2P1n3/5B2

#2

11 + 10

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Rxc3#
    • 1...Qd1
      • 2.Rxc3#
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qg3
      • 2.Sxe2#
      • 2.Sf3#
      • 2.Sb5#
      • 2.Sxc6#
    • 1...Qxh3
      • 2.Sxe2#
      • 2.Sf3#
      • 2.Sb5#
      • 2.Sxc6#
    • 1...Qxd4+
      • 2.Rxd4#
    • 1...Sxd4
      • 2.Rxd4#
    • 1...Sf4
      • 2.Sd2#
    • 1...Sc5+
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qc5#
    • 1...Sd8
      • 2.Qc5#
  • Tries
    • 1.Sxa5+?
      • 1...Sxa5
        • 2.Qc5#
      • 1...Rxa5!
  • Keys
    • 1.e7!
      • threat
        • 2.Qf7#
      • 1...Qxh3+
        • 2.Se6#
      • 1...Qxd4+
        • 2.Rxd4#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Qxe4
        • 2.Rxc3#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Qf3
        • 2.Sxf3#
      • 1...Sf4
        • 2.Sd2#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sd8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_PINS(G),OGATE,P_SPINS(a),XR(H)::R1(E),XR(b)
    • Q(c);OGATE,P_SPINS(a)::R1(E),XR(b)
    • Q(c);N_PINS(G),P_SPINS(a)::R(H)+S(G),XQ(c)
    • Q(c);CHECK,OGATE,P_SPINQ(c),P_SPINS(a),XS(G)::R1(H),XQ(c)
    • S(a);OGATE,P_SPINQ(c),P_SPINS(a),XS(G)::R1(H),XS(a)
    • S(a);P_SPINQ(c),S_CUTB(g)::S(D)
    • S(i);CHECK,N_GUARD::QAR1(I),XS(i)
    • S(i);N_GUARD,N_PINS(G)::QAR1(I)
    • S(i);N_GUARD::QAR1(I)
  • Tries
    • Try
      • S(D);CHECK,XP(e)
      • Vars
        • S(i);XS(D)::QAR1(I)
      • Refutation
        • R(h);XS(D)
  • Actual
    • P(J);
    • Threat
      • QAB(I)
    • Vars
      • Q(c);CHECK,N_PINS(G),P_SPINS(a),XR(E)::R(H)+S(G)
      • Q(c);CHECK,OGATE,P_SPINQ(c),P_SPINS(a),XS(G)::R1(H),XQ(c)
      • S(i);CHECK,N_GUARD::QAR1(I),XS(i)
      • Q(c);N_PINS(G),OGATE,P_SPINS(a),XR(H)::R1(E),XR(b)
      • S(a);OGATE,P_SPINQ(c),P_SPINS(a),XS(G)::R1(H),XS(a)
      • Q(c);N_PINS(G),P_SPINS(a)::R(H)+S(G),XQ(c)
      • S(a);P_SPINQ(c),S_CUTB(g)::S(D)
      • S(i);N_GUARD,N_PINS(G)::QAR1(I)
      • S(i);N_GUARD::QAR1(I)
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