MESON Chess Problem Database

Problem Display
PID: 204438 (5B2/N1n5/4Rr2/pppk1BQ1/4q2b/2PPp3/6N1/3R3K w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1925

5B2/N1n5/4Rr2/pppk1BQ1/4q2b/2PPp3/6N1/3R3K

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2+
      • 2.Qxg2#
    • 1...Qxd3
      • 2.Sxe3#
    • 1...Qxf5
      • 2.Sf4#
    • 1...Qa4
      • 2.Sxe3#
    • 1...Qb4
      • 2.Sxe3#
    • 1...Qc4
      • 2.Sxe3#
    • 1...Qf4
      • 2.Sxf4#
    • 1...Qg4
      • 2.Sxe3#
    • 1...Qxe6
      • 2.Be4#
    • 1...Rxe6
      • 2.Bxe4#
    • 1...Sxe6
      • 2.Bxe4#
    • 1...c4
      • 2.dxe4#
  • Tries
    • 1.Sc8?
      • threat
        • 2.Sb6#
        • 2.Se7#
      • 1...Qxg2+
        • 2.Qxg2#
      • 1...Qxd3
        • 2.Sxe3#
        • 2.Sb6#
      • 1...Qxf5
        • 2.Sf4#
      • 1...Qxe6
        • 2.Be4#
      • 1...Rxe6
        • 2.Bxe4#
      • 1...Sxe6
        • 2.Bxe4#
      • 1...Rf7
        • 2.Sb6#
      • 1...Sa8
        • 2.Se7#
      • 1...c4
        • 2.Sb6#
        • 2.dxe4#
      • 1...Rxf5!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Se7#
      • 1...Qxg2+
        • 2.Qxg2#
      • 1...Qxd3
        • 2.Sxe3#
      • 1...Qxf5
        • 2.Sf4#
      • 1...Qxe6
        • 2.Be4#
      • 1...Rxf5
        • 2.Rd6#
      • 1...Rxe6
        • 2.Bxe4#
      • 1...Sxe6
        • 2.Bxe4#
      • 1...Rf7
        • 2.Rd6#
      • 1...c4
        • 2.dxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(b);CHECK,OGATE,XS(C)::QAB(G),XQ(b)
    • Q(b);N_PINS(C),P_SPINQ(b),XP(E)::S(C),XP(a)
    • Q(b);N_PINS(C),P_SPINQ(b),XB(F)::S(C)
    • Q(b);N_PINS(C)::S(C),XP(a)
    • Q(b);N_PINS(C)::S(C),XQ(b)
    • Q(b);N_PINS(C),SBLOCK,XR(H)::QAR(G)+B(F),DCHECK
    • R(h);SBLOCK,XR(H)::QAR(G)+B(F),DCHECK,XQ(b)
    • S(i);SBLOCK,XR(H)::QAR(G)+B(F),DCHECK,XQ(b)
    • P(f);SBLOCK::R(A)+P(E)DCHECK,XQ(b)
  • Tries
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE,XS(C)::QAB(G),XQ(b)
        • Q(b);N_PINS(C),P_SPINQ(b),XB(F)::S(C)
        • Q(b);N_PINS(C),SBLOCK,XR(H)::QAR(G)+B(F),DCHECK
        • R(h);SBLOCK,XR(H)::QAR(G)+B(F),DCHECK,XQ(b)
        • S(i);SBLOCK,XR(H)::QAR(G)+B(F),DCHECK,XQ(b)
        • R(h);::S(I)
        • S(i);::S(I)
      • Refutation
        • R(h);P_SPINR(h),XB(F)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • Q(b);CHECK,OGATE,XS(C)::QAB(G),XQ(b)
      • Q(b);N_PINS(C),P_SPINQ(b),XP(E)::S(C),XP(a)
      • Q(b);N_PINS(C),P_SPINQ(b),XB(F)::S(C)
      • Q(b);N_PINS(C),SBLOCK,XR(H)::QAR(G)+B(F),DCHECK
      • R(h);N_GUARD,P_SPINR(h),XB(F)::R1(H)
      • R(h);SBLOCK,XR(H)::QAR(G)+B(F),DCHECK,XQ(b)
      • S(i);SBLOCK,XR(H)::QAR(G)+B(F),DCHECK,XQ(b)
      • R(h);N_GUARD::R1(H)
      • P(f);SBLOCK::R(A)+P(E)DCHECK,XQ(b)
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