MESON Chess Problem Database

Problem Display
PID: 75098 (r6k/1p6/4NN2/1P2K1P1/3Q4/4p3/2R5/7r w - - 0 1)

Salvioli, Carlo

Nuova Illustrazione Universale, 1874

(First published on Sun Nov 22 1874)

r6k/1p6/4NN2/1P2K1P1/3Q4/4p3/2R5/7r

#2

7 + 5

6169 Dal classico agli albori del moderno compositori scacchisti 2007
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rha1
      • 2.Rh2#
      • 2.Qh4#
    • 1...Rb1
      • 2.Rh2#
      • 2.Qh4#
    • 1...Rc1
      • 2.Rh2#
      • 2.Qh4#
    • 1...Rd1
      • 2.Rh2#
      • 2.Qh4#
    • 1...Re1
      • 2.Rh2#
      • 2.Qh4#
    • 1...Rf1
      • 2.Rh2#
      • 2.Qh4#
    • 1...Rg1
      • 2.Rh2#
      • 2.Qh4#
    • 1...Rh2
      • 2.Rxh2#
    • 1...Rh4
      • 2.Qxh4#
    • 1...Raa1
      • 2.Rc8#
      • 2.Qd8#
    • 1...Ra2
      • 2.Rc8#
      • 2.Qd8#
    • 1...Ra3
      • 2.Rc8#
      • 2.Qd8#
    • 1...Ra4
      • 2.Rc8#
      • 2.Qd8#
    • 1...Ra5
      • 2.Rc8#
      • 2.Qd8#
    • 1...Ra6
      • 2.Rc8#
      • 2.Qd8#
    • 1...Ra7
      • 2.Rc8#
      • 2.Qd8#
    • 1...Rc8
      • 2.Rxc8#
    • 1...Rd8
      • 2.Qxd8#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qg7#
      • 1...Rh7
        • 2.Qxh7#
      • 1...Rg8!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxh1#
        • 2.Qxa8#
      • 1...Rhxa1
        • 2.Rh2#
      • 1...Raxa1
        • 2.Rc8#
      • 1...Rh3
        • 2.Qxa8#
      • 1...Rb1
        • 2.Rh2#
        • 2.Qxa8#
      • 1...Rc1
        • 2.Rh2#
        • 2.Qxa8#
      • 1...Rd1
        • 2.Rh2#
      • 1...Re1
        • 2.Rh2#
        • 2.Qxa8#
      • 1...Rf1
        • 2.Rh2#
        • 2.Qxa8#
      • 1...Rg1
        • 2.Rh2#
        • 2.Qxa8#
      • 1...Rh2
        • 2.Rxh2#
        • 2.Qxa8#
      • 1...Rh4
        • 2.Qxa8#
      • 1...Rh5
        • 2.Qxa8#
      • 1...Rh6
        • 2.Qxa8#
      • 1...Rh7
        • 2.Qxa8#
      • 1...Ra2
        • 2.Rc8#
        • 2.Qxh1#
      • 1...Ra3
        • 2.Rc8#
        • 2.Qxh1#
      • 1...Ra4
        • 2.Rc8#
      • 1...Ra5
        • 2.Rc8#
        • 2.Qxh1#
      • 1...Ra6
        • 2.Rc8#
        • 2.Qxh1#
      • 1...Ra7
        • 2.Rc8#
        • 2.Qxh1#
      • 1...Rb8
        • 2.Qxh1#
      • 1...Rc8
        • 2.Rxc8#
        • 2.Qxh1#
      • 1...Rd8
        • 2.Qxh1#
      • 1...Re8
        • 2.Qxh1#
      • 1...Rf8
        • 2.Qxh1#
      • 1...Rg8
        • 2.Qxh1#

This anticipates 175509(1899)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 12
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::R(A),XR(a)
    • R(a);N_GUARD::QAR(B),XR(a)
    • R(d);N_GUARD::R(A),XR(d)
    • R(d);N_GUARD::QAR(B),XR(d)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • R(a);N_GUARD::QAR1(B),XR(a)
      • Refutation
        • R(d);
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);N_GUARD,XQ(B)::R(A)
      • R(d);N_GUARD,XQ(B)::R(A)
      • R(a);::QAB1(B),XR(d)
      • R(a);N_GUARD::R(A)
      • R(a);P_PINP(E)::QAB1(B),XR(d)
      • R(d);N_GUARD::R(A)
      • R(d);::QAB(B),XR(a)
      • R(d);P_PINS(F)::QAB(B),XR(a)
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