MESON Chess Problem Database

Problem Display
PID: 206264 (7B/3pp3/RK2k3/8/4B3/1b1Q1R2/3r1p2/8 w - - 0 1)

Ellerman, Arnoldo

Comm., Centurini/Guidelli MT, 1925

7B/3pp3/RK2k3/8/4B3/1b1Q1R2/3r1p2/8

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Kc7#
  • Tries
    • 1.Bd5+?
      • 1...Bxd5
        • 2.Qg6#
      • 1...Kd6!
    • 1.Bh7?
      • threat
        • 2.Bg8#
      • 1...Bd5
        • 2.Qg6#
      • 1...d5
        • 2.Kc7#
      • 1...d6
        • 2.Qf5#
      • 1...Rxd3!
    • 1.Qxd2?
      • threat
        • 2.Qh6#
      • 1...d5
        • 2.Kc7#
      • 1...d6!
    • 1.Qxb3+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...d5
        • 2.Kc7#
      • 1...Kd6!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qh6#
      • 1...Rd6+
        • 2.Bc6#
      • 1...Kd6
        • 2.Kb7#
      • 1...d5
        • 2.Kc7#
      • 1...d6
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD::R(D)+K(E)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • B(c);SBLOCK,XB(C)::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • B(C);
      • Threat
        • B(C)
      • Vars
        • B(c);SBLOCK::QAR2(A)
        • P(e);N_GUARD::R(D)+K(E)
        • P(e);SBLOCK::QAB1(A)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);XR(a)
      • Threat
        • QAR(A)
      • Vars
        • P(e);N_GUARD::R(D)+K(E)
      • Refutation
        • P(e);
    • Try
      • Q(A);CHECK,XB(c)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
        • P(e);P_SPINP(e)::R(D)+K(E)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • R(a);CHECK,SBLOCK::QAR(A)+B(C)
      • K(d);P-FLIGHT::R(D)+K(E)
      • P(e);N_GUARD,S_CUTR(a)::R(D)+K(E)
      • P(e);SBLOCK::QAR(A)+B(C)
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