MESON Chess Problem Database

Problem Display
PID: 215331 (7Q/2K5/2p1p3/3k4/R7/1n6/8/8 w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Land og Folk, 1979

7Q/2K5/2p1p3/3k4/R7/1n6/8/8

#2

3 + 4

15148 Sadier Collection 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qe5#
    • 1...Sa1
      • 2.Qd4#
    • 1...Sc1
      • 2.Qd4#
    • 1...Sd2
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sa5
      • 2.Qd4#
    • 1...Sc5
      • 2.Rd4#
      • 2.Qd4#
  • Tries
    • 1.Rd4+?
      • 1...Kc5
        • 2.Qe5#
      • 1...Sxd4!
    • 1.Re4?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qe5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...e5
        • 2.Qxe5#
      • 1...Kxe4!
    • 1.Qc3?
      • 1...Sd4
        • 2.Qxd4#
      • 1...e5
        • 2.Qc4#
        • 2.Qxc6#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...c5!
    • 1.Qf6?
      • 1...Kc5
        • 2.Qe5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Sc5
        • 2.Rd4#
        • 2.Qd4#
      • 1...e5
        • 2.Qxc6#
        • 2.Qd6#
      • 1...c5!
    • 1.Qh1+?
      • 1...Kc5
        • 2.Qxc6#
      • 1...Ke5!
    • 1.Qd8+?
      • 1...Ke5
        • 2.Qg5#
      • 1...Kc5!
  • Keys
    • 1.Qh4!
      • 1...Kc5
        • 2.Qc4#
      • 1...Ke5
        • 2.Qg5#
      • 1...c5
        • 2.Qe4#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...e5
        • 2.Qc4#

This anticipates 23057(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(C)
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
      • Refutation
        • S(a);XR(A)
    • Try
      • R(A);
      • Threat
        • QAR1(C)
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
        • P(d);::QAR1(C),XP(d)
      • Refutation
        • K(b);S_FLIGHT,XR(A)
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • K(b);P-FLIGHT::QAR2(C)
      • P(c);SBLOCK::QAB1(C)
      • S(a);N_GUARD::QAR1(C)
      • S(a);N_GUARD::QAR1(C),XS(a)
      • P(d);SBLOCK::QAB1(C)
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