MESON Chess Problem Database

Problem Display
PID: 140107 (5n1b/7B/6R1/R1Pk4/1K1Nn3/3N1rpQ/8/6B1 w - - 0 1)

Ellerman, Arnoldo

Problemas, 1945

5n1b/7B/6R1/R1Pk4/1K1Nn3/3N1rpQ/8/6B1

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Rd6#
    • 1...Sf2
      • 2.Rd6#
    • 1...Sc3
      • 2.Rd6#
    • 1...Sg5
      • 2.Rd6#
    • 1...Sd6
      • 2.Rxd6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sxg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sxh7
      • 2.Qe6#
  • Tries
    • 1.Sf4+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Rxf4!
    • 1.Bg8+?
      • 1...Se6
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...Rf7!
    • 1.Qf5+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Rxf5!
    • 1.Qd7+?
      • 1...Sd6
        • 2.Rxd6#
        • 2.Qc6#
      • 1...Sxd7!
    • 1.Qh5+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Sg5
        • 2.Rd6#
      • 1...Rf5!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qa2#
      • 1...Rxd3
        • 2.c6#
      • 1...Sxc5
        • 2.Qxf3#
      • 1...Rf2
        • 2.Rd6#
      • 1...Re3
        • 2.Rd6#
      • 1...Sd2
        • 2.Rd6#
      • 1...Sf2
        • 2.Rd6#
      • 1...Sc3
        • 2.Rd6#
      • 1...Sg5
        • 2.Rd6#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sf6
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::R1(H)
    • S(c);N_GUARD::R1(H),XS(c)
    • S(e);N_GUARD::QAB1(C),XS(e)
    • S(e);N_GUARD,XR(H)::QAB1(C)
    • S(e);N_GUARD::QAB1(C)
    • S(e);N_GUARD,XB(I)::QAB1(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(C)
      • Refutation
        • R(a);XS(B)
    • Try
      • B(I);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(C);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(C),XB(f)
      • Refutation
        • R(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • S(e);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(C),XB(f)
        • S(c);P_SPINS(c)::R1(H)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • R(a);P_SPINS(c),XS(B)::R(F)+P(G)
      • S(c);OGATEB,P_SPINR(a),P_SPINS(c),XP(G)::QAB(C),XR(a)
      • R(a);P_SPINS(c)::R1(H)
      • S(c);N_GUARD,P_SPINR(a)::R1(H)
      • S(c);N_GUARD,P_SPINR(a)::R1(H),XS(c)
      • S(c);N_GUARD,P_SPINR(a),S_CUTB(f)::R(H)
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