MESON Chess Problem Database

Problem Display
PID: 234241 (B1Nb4/6pK/3P2Qn/P1p2n2/Ppk5/1N5R/PPb4q/2R1r3 w - - 0 1)

Ellerman, Arnoldo

Chess World (The), 1947

B1Nb4/6pK/3P2Qn/P1p2n2/Ppk5/1N5R/PPb4q/2R1r3

#2

12 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Rxc2#
    • 1...Qf4
      • 2.Rxc2#
    • 1...Qxd6
      • 2.Rxc2#
    • 1...Qh1
      • 2.Rxc2#
    • 1...Rxc1
      • 2.Qe6#
    • 1...Rf1
      • 2.Qe6#
    • 1...Rg1
      • 2.Qe6#
    • 1...Rh1
      • 2.Qe6#
    • 1...Re6
      • 2.Qxe6#
    • 1...Bh4
      • 2.Sb6#
    • 1...Bg5
      • 2.Sb6#
    • 1...Bb6
      • 2.Sxb6#
    • 1...Bf6
      • 2.Sb6#
    • 1...Be7
      • 2.Sb6#
    • 1...Se3
      • 2.Qe4#
    • 1...Sd4
      • 2.Qd3#
    • 1...Sh4
      • 2.Qd3#
    • 1...Sxd6
      • 2.Qd3#
    • 1...Se7
      • 2.Qd3#
  • Tries
    • 1.Qf7+?
      • 1...Re6
        • 2.Qxe6#
      • 1...Sxf7!
  • Keys
    • 1.d7!
      • threat
        • 2.Qa6#
      • 1...Qd6
        • 2.Rxc2#
      • 1...Qb8
        • 2.Rxc2#
      • 1...Re6
        • 2.Qxe6#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bf6
        • 2.Sb6#
      • 1...Se3
        • 2.Qe4#
      • 1...Sg3
        • 2.Sd6#
      • 1...Sd4
        • 2.Qd3#
      • 1...Sh4
        • 2.Qd3#
      • 1...Sd6
        • 2.Qd3#
      • 1...Se7
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD::R(A),XB(b)
    • Q(c);N_GUARD,XP(H)::R(A),XB(b)
    • R(a);N_GUARD,N_SPINB(b),XR(A)::QAB(I)
    • R(a);N_GUARD::QAB(I)
    • R(a);N_GUARD::QAB(I),XR(a)
    • B(j);N_GUARD::S(L)
    • B(j);N_GUARD::S(L),XB(j)
    • S(g);OGATE,P_PINQ(I)::QAR2(I)
    • S(g);OGATE,P_PINQ(I)::QAB1(I)
    • S(g);OGATE,P_PINQ(I),XP(H)::QAB1(I)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB(I),XR(a)
      • Refutation
        • S(h);P_PINR(E),XQ(I)
  • Actual
    • P(H);
    • Threat
      • QAB(I)
    • Vars
      • Q(c);N_GUARD::R(A),XB(b)
      • R(a);N_GUARD::QAB(I),XR(a)
      • B(j);N_GUARD::S(L),XB(j)
      • B(j);N_GUARD::S(L)
      • S(g);OGATE,P_PINQ(I)::QAR2(I)
      • S(g);N_GUARD,P_PINQ(I),S_CUTQ(c)::S(L)
      • S(g);OGATE,P_PINQ(I)::QAB1(I)
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