MESON Chess Problem Database

Problem Display
PID: 48642 (8/3KN3/1p1B1p2/1Rb5/3pk3/3R1r1P/2r3Q1/1B4n1 w - - 0 1)

Valle, Giovanni Batista

1st Sp. Prize, Freie Presse, 1877

8/3KN3/1p1B1p2/1Rb5/3pk3/3R1r1P/2r3Q1/1B4n1

#2

8 + 8

508 Chess Chips 1878
6169 Dal classico agli albori del moderno compositori scacchisti 2007
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qxf3#
    • 1...Sxh3
      • 2.Qxf3#
  • Tries
    • 1.Qg6+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...f5!
  • Keys
    • 1.Sf5!
      • 1...Kxd3
        • 2.Qxc2#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Rxg2
        • 2.Rxd4#
      • 1...Bxd6
        • 2.Rxd4#
      • 1...Sxh3
        • 2.Qxf3#
      • 1...Rc1
        • 2.Rxd4#
      • 1...Ra2
        • 2.Rxd4#
      • 1...Rb2
        • 2.Rxd4#
      • 1...Rd2
        • 2.Rxd4#
      • 1...Re2
        • 2.Rxd4#
      • 1...Rf2
        • 2.Rxd4#
      • 1...Rc3
        • 2.Rxd4#
      • 1...Rc4
        • 2.Rxd4#
      • 1...Ba3
        • 2.Rxd4#
      • 1...Bb4
        • 2.Rxd4#
      • 1...Se2
        • 2.Qxf3#

This anticipates 51007(1958)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B),XR(c)
    • S(a);N_GUARD,XP(D)::QAB1(B),XR(c)
  • Tries
    • Try
      • Q(B);CHECK,N_PINR(c)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(B),XR(c)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • S(H);
    • Vars
      • K(e);N_SPINR(c),OGATEB,P_SPINR(b),S_FLIGHT,XR(C)::QAB1(B),XR(b)
      • K(e);P_SPINB(f),P_SPINP(d),S_FLIGHT::R1(C),XP(d)
      • K(e);N_SPINR(c),P_SPINB(f),S_FLIGHT,XS(H)::QAB1(B)
      • R(b);N_SPINR(c),XQ(B)::B(A)+R(C),DCHECK,XP(d)
      • B(f);N_GUARD,XB(F)::R1(C),XP(d)
      • S(a);N_GUARD,XP(D)::QAB1(B),XR(c)
      • R(b);::B(A)+R(C),DCHECK,XP(d)
      • B(f);N_GUARD::R1(C),XP(d)
      • S(a);N_GUARD::QAB1(B),XR(c)
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