MESON Chess Problem Database

Problem Display
PID: 161697 (8/4r2B/4p1n1/R1b5/R2P2k1/3b2PN/3N2PP/2Q3K1 w - - 0 1)

Apro, Laszlo

Smena, 1961

8/4r2B/4p1n1/R1b5/R2P2k1/3b2PN/3N2PP/2Q3K1

#2

11 + 6

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qd1#
    • 1...Ba3
      • 2.Sf2#
      • 2.Rg5#
    • 1...Bb4
      • 2.Sf2#
      • 2.Rg5#
    • 1...Bxd4+
      • 2.Sf2#
    • 1...Bb6
      • 2.Sf2#
      • 2.Rg5#
    • 1...Bd6
      • 2.Sf2#
      • 2.Rg5#
    • 1...Ba7
      • 2.Sf2#
      • 2.Rg5#
  • Tries
    • 1.Sb1?
      • threat
        • 2.Qg5#
      • 1...Bxd4+
        • 2.Sf2#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5
        • 2.Qg5#
      • 1...Sf4!
    • 1.Sf1?
      • threat
        • 2.Qg5#
      • 1...Bxd4+
        • 2.Se3#
        • 2.Sf2#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5
        • 2.Qg5#
      • 1...Sf4!
    • 1.Sb3?
      • threat
        • 2.Qg5#
      • 1...Bxd4+
        • 2.Sf2#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5
        • 2.Qg5#
      • 1...Sf4!
    • 1.Sf3?
      • threat
        • 2.Qg5#
      • 1...Bxd4+
        • 2.Sf2#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5
        • 2.Qg5#
      • 1...Sf4!
    • 1.Sc4?
      • threat
        • 2.Qg5#
      • 1...Bxd4+
        • 2.Se3#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5
        • 2.Qg5#
      • 1...Sf4!
    • 1.Qd1+?
      • 1...Kf5
        • 2.Qf3#
      • 1...Be2!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qg5#
      • 1...Bxd4+
        • 2.Sef2#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kh5
        • 2.Sf6#
        • 2.Qg5#
      • 1...Sf4
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD,SBLOCK::QAB(A)
    • B(c);CHECK,P_SPINB(c),XP(I)::S(G)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • B(c);CHECK,P_SPINB(c),XP(I)::S(G)
        • K(b);P_SPINB(c),P_SPINS(e),S_FLIGHT::QAR1(A)
        • K(b);P_SPINB(c),S_FLIGHT::QAR1(A)
      • Refutation
        • S(e);
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P_SPINB(c),P_SPINS(e),S_FLIGHT::QAR1(A)
        • K(b);P_SPINB(c),S_FLIGHT::QAR1(A)
      • Refutation
        • S(e);
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • B(c);CHECK,P_SPINB(c),XP(I)::S(G)
        • K(b);P_SPINB(c),P_SPINS(e),S_FLIGHT::QAR1(A)
        • K(b);P_SPINB(c),S_FLIGHT::QAR1(A)
      • Refutation
        • S(e);
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • B(c);CHECK,P_SPINB(c),XP(I)::S(G)
        • K(b);P_SPINB(c),P_SPINS(e),S_FLIGHT::QAR1(A)
        • K(b);P_SPINB(c),S_FLIGHT::QAR1(A)
      • Refutation
        • S(e);
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • B(c);CHECK,XP(I)::S(C)
        • K(b);P_SPINB(c),P_SPINS(e),S_FLIGHT::QAR1(A)
        • K(b);P_SPINB(c),S_FLIGHT::QAR1(A)
      • Refutation
        • S(e);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINB(c),P_SPINS(e),S_FLIGHT::QAR2(A)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • B(c);CHECK,XP(I)::S(C)
      • K(b);P_SPINB(c),P_SPINS(e),S_FLIGHT::QAR1(A)
      • S(e);::S(C)
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