MESON Chess Problem Database

Problem Display
PID: 139576 (3NR3/4Npp1/2KR4/b1QPk1p1/6n1/3P1qP1/6n1/8 w - - 0 1)

Ellerman, Arnoldo

Ajedrez Argentino, 1926

3NR3/4Npp1/2KR4/b1QPk1p1/6n1/3P1qP1/6n1/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sxf7#
    • 1...Qe2
      • 2.Sxf7#
    • 1...Qe4
      • 2.Sxf7#
    • 1...Qxd5+
      • 2.Qxd5#
    • 1...Qe3
      • 2.Sxf7#
    • 1...Qf5
      • 2.Sg6#
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bc7
      • 2.Qc3#
    • 1...Bxd8
      • 2.Qc3#
    • 1...Sf4
      • 2.Sxf7#
    • 1...Sf6
      • 2.Sxf7#
    • 1...f5
      • 2.Sg6#
      • 2.Sc8#
      • 2.Sg8#
      • 2.Sf7#
      • 2.Re6#
    • 1...f6
      • 2.Sf7#
      • 2.Re6#
  • Keys
    • 1.Rf6!
      • threat
        • 2.Sg8#
      • 1...Qxd5+
        • 2.Sxd5#
      • 1...Qxf6+
        • 2.d6#
      • 1...Kxf6
        • 2.Qd6#
      • 1...Bxd8
        • 2.Qc3#
      • 1...Sxf6
        • 2.Sxf7#
      • 1...gxf6
        • 2.Sxf7#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Sf4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD,N_PINP(D)::S(H),XP(g)
    • Q(b);N_GUARD::S(H),XP(g)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(D)::QAR1(C),XQ(b)
    • Q(b);N_PINP(D),SBLOCK::R(I)+S(G),DCHECK
    • B(d);N_GUARD::QAB(C),XB(d)
    • B(d);N_GUARD::QAB(C)
    • B(d);N_GUARD,XS(H)::QAB(C)
    • S(a);S_CUTQ(b)::S(H),XP(g)
    • S(c);S_CUTQ(b)::S(H),XP(g)
  • Actual
    • R(F);
    • Threat
      • R(I)+S(G)
    • Vars
      • Q(b);CHECK,P_SPINQ(b),XP(D)::R(I)+S(G),XQ(b)
      • Q(b);CHECK,N_PINP(D),SBLOCK,XR(F)::QAR(C)+P(D)
      • K(e);S_FLIGHT,XR(F)::QAR2(C)
      • B(d);N_GUARD,XS(H)::QAB(C)
      • S(c);SBLOCK,XR(F)::S(H),XP(g)
      • P(h);SBLOCK,XR(F)::S(H),XP(g)
      • Q(b);N_GUARD,N_PINP(D)::R1(F),XQ(b)
      • S(a);S_CUTQ(b)::R1(F)
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