MESON Chess Problem Database

Problem Display
PID: 129842 (8/8/2p3K1/6p1/6p1/5NR1/p1Qn4/nr5k w - - 0 1)

Janousek, Ladislav

Ruch, 1948

8/8/2p3K1/6p1/6p1/5NR1/p1Qn4/nr5k

#2

4 + 8

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Rxg1#
    • 1...Rb2
      • 2.Rg1#
    • 1...Rb3
      • 2.Rg1#
    • 1...Rb4
      • 2.Rg1#
    • 1...Rb5
      • 2.Rg1#
    • 1...Rb6
      • 2.Rg1#
    • 1...Rb7
      • 2.Rg1#
    • 1...Rb8
      • 2.Rg1#
    • 1...Sf1
      • 2.Rg1#
      • 2.Qg2#
    • 1...Sb3
      • 2.Qg2#
      • 2.Qh2#
    • 1...Sxf3
      • 2.Qg2#
    • 1...Sc4
      • 2.Qg2#
      • 2.Qh2#
    • 1...Se4
      • 2.Qg2#
      • 2.Qh2#
  • Tries
    • 1.Qd1+?
      • 1...Sf1
        • 2.Rg1#
      • 1...Rxd1!
    • 1.Qc1+?
      • 1...Sf1
        • 2.Rg1#
      • 1...Rxc1!
    • 1.Qxd2?
      • threat
        • 2.Qg2#
        • 2.Qh2#
      • 1...Rg1
        • 2.Rxg1#
        • 2.Qh2#
      • 1...Rb2
        • 2.Rg1#
        • 2.Qc1#
        • 2.Qe1#
        • 2.Qd1#
      • 1...gxf3!
    • 1.Qc3?
      • threat
        • 2.Qh8#
      • 1...Rb7
        • 2.Rg1#
      • 1...Rb8
        • 2.Rg1#
      • 1...Sf1
        • 2.Rg1#
      • 1...Sxf3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qh8#
      • 1...Rxb2
        • 2.Rg1#
      • 1...Sxf3
        • 2.Qg2#
      • 1...Sf1
        • 2.Rg1#
        • 2.Qg2#

Anticipated by 120112(1905)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::R1(C),XR(b)
    • R(b);N_GUARD::R1(C)
    • S(e);OGATE,XS(B)::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);P_SPINS(e)::R1(C)
      • Refutation
        • R(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);P_SPINS(e)::R1(C)
      • Refutation
        • R(b);XQ(A)
    • Try
      • Q(A);XS(e)
      • Threat
        • DUALS(2)
      • Refutation
        • P(f);XS(B)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(b);N_GUARD::R1(C)
        • S(e);S_CUTR(b)::R1(C)
      • Refutation
        • S(e);XS(B)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(b);N_GUARD,XQ(A)::R1(C)
      • S(e);OGATE,XS(B)::QAB1(A)
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