MESON Chess Problem Database

Problem Display
PID: 233546 (4N2B/bbqpp3/p1r4p/R3pkpQ/8/6P1/2N3BR/7K w - - 0 1)

Viksna, Kristaps

Freie Presse, 1973

4N2B/bbqpp3/p1r4p/R3pkpQ/8/6P1/2N3BR/7K

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qg6#
    • 1...Qb6
      • 2.Rxe5#
    • 1...Qd8
      • 2.Rxe5#
    • 1...Qc8
      • 2.Rxe5#
    • 1...Rb6
      • 2.Sd4#
    • 1...Rd6
      • 2.Rxe5#
    • 1...Rf6
      • 2.Sg7#
    • 1...Bd4
      • 2.Sxd4#
    • 1...Bb8
      • 2.Sd4#
  • Tries
    • 1.Se3+?
      • 1...Ke6
        • 2.Bd5#
        • 2.Qg6#
      • 1...Bxe3!
    • 1.Be4+?
      • 1...Ke6
        • 2.Qg6#
      • 1...Kxe4!
    • 1.Qf3+?
      • 1...Ke6
        • 2.Rxh6#
      • 1...Kg6!
    • 1.Qf7+?
      • 1...Kg4
        • 2.Qf3#
      • 1...Rf6!
    • 1.g4+?
      • 1...Ke6
        • 2.Bd5#
        • 2.Qg6#
      • 1...Kf4!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Bh3#
      • 1...Ke6
        • 2.Qg6#
      • 1...Rxc2
        • 2.Qf7#
      • 1...Rc3
        • 2.Qf7#
      • 1...Rc4
        • 2.Qf7#
      • 1...Rc5
        • 2.Qf7#
      • 1...Rb6
        • 2.Sd4#
      • 1...Rd6
        • 2.Rxe5#
      • 1...Re6
        • 2.Rf4#
      • 1...Rf6
        • 2.Sg7#
      • 1...Rg6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::QAR2(G)
    • Q(i);N_GUARD::R1(F),XP(a)
    • R(e);P_PINB(C),S_CUTB(g)::S(B)
    • R(e);P_PINB(C),S_CUTQ(i)::R1(F),XP(a)
    • R(e);P_PINB(C),SBLOCK::S(H)
    • B(g);N_GUARD::S(B),XB(g)
    • B(g);N_GUARD::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • B(g);XS(B)
    • Try
      • B(C);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR2(G)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XB(C)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R(D),XP(f)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);N_SPINP(a),OGATE,S_FLIGHT::QAB1(G)
      • Refutation
        • R(e);P_PINB(C),P_SPINR(e)
    • Try
      • P(E);CHECK
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
  • Actual
    • R(D);
    • Threat
      • B(C)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::QAR2(G)
      • R(e);N_GUARD,P_PINB(C),XS(B)::QAR2(G)
      • R(e);N_GUARD,P_PINB(C)::QAR2(G)
      • R(e);N_GUARD,N_SPINP(a),P_PINB(C),P_SPINP(c)::QAR2(G)
      • R(e);P_PINB(C),S_CUTB(g)::S(B)
      • R(e);P_PINB(C),S_CUTQ(i)::R1(F),XP(a)
      • R(e);P_PINB(C),SBLOCK::R1(D)
      • R(e);P_PINB(C),SBLOCK::S(H)
      • R(e);P_PINB(C),SBLOCK::QAB1(G)
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