MESON Chess Problem Database

Problem Display
PID: 228931 (rRq1k2N/2P1n3/pN5B/4rP2/b5Qn/b4p1K/8/4R3 w - - 0 1)

Ellerman, Arnoldo

Mari, Alberto

Comm., L'Italia Scacchistica, 1926

rRq1k2N/2P1n3/pN5B/4rP2/b5Qn/b4p1K/8/4R3

#2

9 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd8
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Ra5
      • 2.Qg8#
    • 1...Rb5
      • 2.Qg8#
    • 1...Rc5
      • 2.Qg8#
    • 1...Rd5
      • 2.Qg8#
  • Tries
    • 1.Rxe5?
      • threat
        • 2.Qxa4#
        • 2.Qg8#
      • 1...Rxb8
        • 2.Qg8#
      • 1...Bb4
        • 2.Qg8#
      • 1...Bd1
        • 2.Qg8#
      • 1...Bc2
        • 2.Qg8#
      • 1...Bb5
        • 2.Qg8#
      • 1...Bc6
        • 2.Qg8#
      • 1...Bd7
        • 2.Qg8#
      • 1...Sg6
        • 2.Qxa4#
        • 2.Qxg6#
      • 1...Bb3!
    • 1.Qg7?
      • threat
        • 2.Qf8#
        • 2.Qf7#
      • 1...Sexf5
        • 2.Qf7#
      • 1...Bb3
        • 2.Qf8#
      • 1...Shg6
        • 2.Qf7#
      • 1...Sd5
        • 2.Qf7#
      • 1...Sc6
        • 2.Qd7#
        • 2.Qf7#
      • 1...Seg6
        • 2.Qf7#
      • 1...Sg8
        • 2.Qf7#
      • 1...Rxf5!
  • Keys
    • 1.f6!
      • threat
        • 2.f7#
      • 1...Rf5
        • 2.Qg8#
      • 1...Bb3
        • 2.Qd7#
      • 1...Sd5
        • 2.Qxc8#
      • 1...Sef5
        • 2.Qxa4#
      • 1...Sc6
        • 2.Qd7#
      • 1...Seg6
        • 2.Qxc8#
      • 1...Sg8
        • 2.Qxc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(i);OGATE::PXQ(i)=Q
    • R(e);P_SPINS(g)::QAR2(C)
  • Tries
    • Try
      • R(A);P_PINS(g),XR(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);N_SPINQ(i),XR(H)::QAR2(C)
        • B(a);::QAR2(C)
        • B(c);::QAR2(C)
      • Refutation
        • B(c);
    • Try
      • Q(C);P_SPINP(D)
      • Threat
        • DUALS(2)
      • Vars
        • S(g);P_SPINR(e),XP(D)::QAB1(C)
        • B(c);::QAR1(C)
        • S(d);::QAB1(C)
        • S(g);P_SPINR(e)::QAB1(C)
      • Refutation
        • R(e);P_SPINS(g),XP(D)
  • Actual
    • P(D);P_SPINQ(C)
    • Threat
      • P(D)
    • Vars
      • R(e);N_PINQ(C),P_SPINS(g)::QAR2(C)
      • B(c);N_GUARD::QAB1(C)
      • S(g);N_GUARD,P_SPINR(e)::QAR2(C),XQ(i)
      • S(g);N_PINQ(C),P_SPINR(e)::QAB(C),XB(c)
      • S(g);P_SPINR(e),S_CUTB(c)::QAB1(C)
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Developed and maintained by Brian Stephenson.
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