MESON Chess Problem Database

Problem Display
PID: 187856 (8/3p1p2/3Rn3/4k3/1P5K/8/5R2/6Q1 w - - 0 1)

Simkhovich, Froim Markovich

Narodni Politika, 1910

8/3p1p2/3Rn3/4k3/1P5K/8/5R2/6Q1

#2

5 + 4

6490 yacpdb 2019
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qe1#
  • Tries
    • 1.Rxf7?
      • 1...Ke4
        • 2.Qe1#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sf4
        • 2.Qd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...Sg5
        • 2.Qd4#
      • 1...Sc7
        • 2.Qd4#
      • 1...Sg7
        • 2.Qd4#
      • 1...Sd8
        • 2.Qd4#
      • 1...Sf8
        • 2.Qd4#
      • 1...Kxd6!
    • 1.Qh2+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Ke4!
    • 1.Qa1+?
      • 1...Ke4
        • 2.Qe1#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Kxd6!
    • 1.Qg3+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Ke4!
  • Keys
    • 1.Rf6!
      • 1...Ke4
        • 2.Qe1#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Sd4
        • 2.Qe3#
        • 2.Qxd4#
      • 1...Sf4
        • 2.Qe3#
        • 2.Qd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...Sg5
        • 2.Qd4#
      • 1...Sc7
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qe1#
      • 1...Sg7
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qe1#
      • 1...Sd8
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qe1#
      • 1...Sf8
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qe1#

This anticipates 154414(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR(A)
  • Tries
    • Try
      • R(B);XP(d)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(a);P-FLIGHT::QAR(A)
      • K(a);P_SPINS(b),S_FLIGHT,XR(E)::QAB1(A)
      • K(a);P_SPINS(b),S_FLIGHT,XR(B)::QAB1(A)
      • S(b);N_GUARD::QAB1(A)
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