MESON Chess Problem Database

Problem Display
PID: 138782 (7N/3Q2p1/7k/8/5P1K/8/8/4R3 w - - 0 1)

Svitek, Miroslav

2nd HM., StrateGems 01. Miniature Ty., 2010

7N/3Q2p1/7k/8/5P1K/8/8/4R3

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...g5+
      • 2.fxg5#
  • Tries
    • 1.Kg3?
      • threat
        • 2.Rh1#
        • 2.Qh3#
      • 1...Kh5
        • 2.Rh1#
        • 2.Qh3#
      • 1...g5
        • 2.Rh1#
      • 1...g6
        • 2.Rh1#
      • 1...Kh7!
    • 1.Re6+?
      • 1...g6
        • 2.Rxg6#
      • 1...Kh7!
    • 1.Re7?
      • 1...g5+
        • 2.fxg5#
      • 1...g6
        • 2.Rh7#
      • 1...Kh7!
    • 1.Qf5?
      • threat
        • 2.Sf7#
        • 2.Qg6#
        • 2.Qh5#
      • 1...g6
        • 2.Qxg6#
      • 1...g5+!
    • 1.Qc6+?
      • 1...g6
        • 2.Qxg6#
      • 1...Kh7!
    • 1.Qe6+?
      • 1...g6
        • 2.Qxg6#
      • 1...Kh7!
    • 1.Qd3?
      • threat
        • 2.Sf7#
        • 2.Qg6#
      • 1...g6
        • 2.Qxg6#
      • 1...g5+!
    • 1.Qd6+?
      • 1...g6
        • 2.Qxg6#
      • 1...Kh7!
    • 1.Qf7?
      • threat
        • 2.Qh5#
        • 2.Qg6#
      • 1...g5+
        • 2.fxg5#
      • 1...g6
        • 2.Qxg6#
      • 1...Kh7!
  • Keys
    • 1.Rg1!
      • threat
        • 2.Qxg7#
      • 1...g5+
        • 2.fxg5#
      • 1...Kh7
        • 2.Qxg7#
      • 1...g6
        • 2.Rxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);CHECK,OGATE::P(B),XP(b)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::R(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • R(A);CHECK
      • Vars
        • P(b);P_SPINP(b)::R1(A),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • R(A);
      • Vars
        • P(b);CHECK,OGATE::P(B),XP(b)
        • P(b);OGATE::R1(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(D);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);::QAR1(D),XP(b)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(D);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(D),XP(b)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(D);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK,OGATE::P(B),XP(b)
        • P(b);::QAR1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
  • Actual
    • R(A);
    • Threat
      • QAB1(D),XP(b)
    • Vars
      • P(b);CHECK,OGATE::P(B),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR1(D),XP(b)
      • P(b);::R1(A),XP(b)
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