MESON Chess Problem Database

Problem Display
PID: 270031 (7K/4Q3/1R6/3B1b2/P2k1N2/6P1/n7/b3B3 w - - 0 1)

Petrasinovic, Petrasin

Shakhmatnaya Poeziya, 1998

7K/4Q3/1R6/3B1b2/P2k1N2/6P1/n7/b3B3

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Bf2#
    • 1...Sc1
      • 2.Rb4#
    • 1...Sc3
      • 2.Bf2#
      • 2.Rb4#
    • 1...Sb4
      • 2.Rxb4#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Bf2#
        • 2.Qe3#
      • 1...Bc3
        • 2.Bf2#
      • 1...Bd3
        • 2.Bf2#
        • 2.Rxd3#
      • 1...Be4
        • 2.Bf2#
      • 1...Sc3
        • 2.Bf2#
        • 2.Rb4#
      • 1...Be6!
    • 1.Rc6?
      • threat
        • 2.Bf2#
        • 2.Rc4#
      • 1...Be4
        • 2.Bf2#
        • 2.Qxe4#
      • 1...Bd3
        • 2.Bf2#
      • 1...Be6!
    • 1.Qc5+?
      • 1...Ke5
        • 2.Bh1#
        • 2.Bg2#
        • 2.Bf3#
        • 2.Bb7#
        • 2.Ba8#
      • 1...Kxc5+!
    • 1.Qf6+?
      • 1...Kc5
        • 2.Rb5#
        • 2.Rc6#
      • 1...Ke3!
    • 1.Qe5+?
      • 1...Kc5
        • 2.Rb5#
        • 2.Rc6#
      • 1...Kxe5!
    • 1.Qg7+?
      • 1...Kc5
        • 2.Rc6#
      • 1...Ke3!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Re6#
      • 1...Ke3+
        • 2.Rb2#
      • 1...Kc5+
        • 2.Rf6#
      • 1...Ke5
        • 2.Qg7#
      • 1...Be6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(a);SBLOCK::B(A)
    • S(b);N_GUARD::R(F)
    • S(b);N_GUARD::R(F),XS(b)
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::B(A)
        • B(d);::B(A)
      • Refutation
        • B(d);
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);::B(A)
      • Refutation
        • B(d);
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);CHECK,S_FLIGHT,XQ(G)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);P_PINQ(G),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);N_GUARD,P_PINQ(G),S_FLIGHT::R1(F)
      • Refutation
        • K(c);P_PINQ(G),S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+R(F)
    • Vars
      • K(c);CHECK,N_GUARD,S_FLIGHT::QAB(G)+R(F)
      • K(c);N_GUARD,S_FLIGHT::QAB(G)
      • B(d);::QAB(G)+R(F),XB(d)
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