MESON Chess Problem Database

Problem Display
PID: 232830 (8/3Q1p2/8/3RN2K/N2pk1pp/4p3/b1r1pb1B/3r3q w - - 0 1)

Ellerman, Arnoldo

Il Due Mosse, 1952

8/3Q1p2/8/3RN2K/N2pk1pp/4p3/b1r1pb1B/3r3q

#2

6 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rxd4#
    • 1...Rb1
      • 2.Rxd4#
    • 1...Rdc1
      • 2.Rxd4#
    • 1...Re1
      • 2.Rxd4#
    • 1...Rf1
      • 2.Rxd4#
    • 1...Rg1
      • 2.Rxd4#
    • 1...Rb2
      • 2.Sc5#
    • 1...Rd2
      • 2.Sc5#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Bc4
      • 2.Sc5#
    • 1...Bxd5
      • 2.Qxg4#
    • 1...d3
      • 2.Rd4#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qf5#
      • 1...Kxd3
        • 2.Rxd4#
      • 1...Kf3
        • 2.Qxg4#
      • 1...Qf3
        • 2.Rxd4#
      • 1...f5
        • 2.Qxf5#
      • 1...Bxd5!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Rxd4#
      • 1...Kf3
        • 2.Qxg4#
      • 1...Qf3
        • 2.Sc5#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • R(a);N_GUARD::R1(C),XP(h)
    • R(d);N_GUARD::S(B)
    • R(d);N_GUARD::S(B),XR(d)
    • B(c);S_CUTR(d)::S(B)
    • B(c);SBLOCK,XR(C)::QAR2(F),XP(j)
    • P(h);S_CUTR(a)::R1(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(F)
      • Vars
        • K(i);P_SPINP(h),S_FLIGHT,XS(D)::R1(C),XP(h)
        • K(i);S_FLIGHT::QAB1(F),XP(j)
        • Q(b);SBLOCK::R1(C),XP(h)
        • P(l);::QAB1(F),XP(l)
      • Refutation
        • B(c);XR(C)
  • Actual
    • S(D);
    • Threat
      • QAB1(F)
    • Vars
      • K(i);P_SPINP(h),S_FLIGHT::R1(C),XP(h)
      • K(i);S_FLIGHT::QAB1(F),XP(j)
      • Q(b);SBLOCK::S(B)
      • P(l);::QAB1(F),XP(l)
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