MESON Chess Problem Database

Problem Display
PID: 232840 (7b/ppQ3B1/4pn2/3P4/1p1k4/n2P2R1/1K6/3RN2B w - - 0 1)

Ellerman, Arnoldo

Il Due Mosse, 1954

7b/ppQ3B1/4pn2/3P4/1p1k4/n2P2R1/1K6/3RN2B

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sc2#
    • 1...Sc2
      • 2.Sxc2#
    • 1...Sc4+
      • 2.dxc4#
    • 1...Sb5
      • 2.Sc2#
    • 1...b3
      • 2.Qc3#
  • Tries
    • 1.Bf8?
      • threat
        • 2.Bc5#
      • 1...Sc4+
        • 2.dxc4#
      • 1...Se4
        • 2.dxe4#
      • 1...Sd7
        • 2.Qf4#
      • 1...b6!
    • 1.Rc1?
      • threat
        • 2.Qf4#
      • 1...Sc4+
        • 2.Rxc4#
      • 1...e5
        • 2.Qc5#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Bxg7!
    • 1.dxe6?
      • threat
        • 2.Qd6#
      • 1...Sc4+
        • 2.dxc4#
      • 1...Sb5
        • 2.Sc2#
      • 1...Bxg7!
  • Keys
    • 1.Bh6!
      • threat
        • 2.Be3#
      • 1...Sc4+
        • 2.dxc4#
      • 1...Sxd5
        • 2.Sf3#
      • 1...Se4
        • 2.dxe4#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sg4
        • 2.Rxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • S(a);CHECK,OGATE::R(A)+P(E),XS(a)
    • P(b);N_GUARD::QAB1(H)
  • Tries
    • Try
      • B(I);N_PINS(e)
      • Threat
        • B(I)
      • Vars
        • S(a);CHECK,OGATE::R(A)+P(E),XS(a)
        • S(e);OGATE::R(A)+P(E),XS(e)
        • S(e);N_GUARD::QAR2(H)
      • Refutation
        • P(g);
    • Try
      • R(A);
      • Threat
        • QAR2(H)
      • Vars
        • S(a);CHECK,N_GUARD::R1(A),XS(a)
        • P(d);N_SPINS(e),SBLOCK::QAB1(H)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • B(h);N_SPINS(e),XB(I)
    • Try
      • P(G);XP(d)
      • Threat
        • QAR2(H)
      • Vars
        • S(a);CHECK,OGATE::R(A)+P(E),XS(a)
        • S(a);N_GUARD::S(B)
      • Refutation
        • B(h);N_SPINS(e),XB(I)
  • Actual
    • B(I);N_PINS(e)
    • Threat
      • B(I)
    • Vars
      • S(a);CHECK,OGATE::R(A)+P(E),XS(a)
      • S(e);SBLOCK,XP(G)::S(B)
      • S(e);OGATE::R(A)+P(E),XS(e)
      • S(a);N_GUARD::S(B),XS(a)
      • S(e);N_GUARD::R(F),XS(e)
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