MESON Chess Problem Database

Problem Display
PID: 197958 (4r3/3Q3N/1B6/R1N1P2p/5k2/R1b2r1p/2Kp3P/3B4 w - - 0 1)

Larrain, Santiago

The Problemist, 1981

4r3/3Q3N/1B6/R1N1P2p/5k2/R1b2r1p/2Kp3P/3B4

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qxd2#
    • 1...Kxe5
      • 2.Bc7#
    • 1...Bxe5
      • 2.Rxf3#
  • Tries
    • 1.Sd3+?
      • 1...Ke4
        • 2.Sg5#
      • 1...Rxd3!
    • 1.Qf5+?
      • 1...Ke3
        • 2.Sa4#
        • 2.Se4#
        • 2.Sa6#
        • 2.Se6#
        • 2.Sb7#
        • 2.Sd7#
      • 1...Kxf5!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Bxd4!
    • 1.Qd5?
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Se6#
        • 2.Qxd2#
      • 1...Kg4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Rxe5
        • 2.Qxf3#
      • 1...Re3!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Se6#
      • 1...Kg4
        • 2.Qe4#
      • 1...Kxe5
        • 2.Sd3#
      • 1...Kf5
        • 2.Qe4#
      • 1...Rxe5
        • 2.Qxf3#
      • 1...Re3
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(e);P_SPINB(b),S_FLIGHT::QAB1(I),XP(a)
    • K(e);OGATEB,S_FLIGHT,XP(G)::B(H)
    • B(b);OGATE,SBLOCK,XP(G)::R1(D),XR(c)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);P-FLIGHT::S(J)
      • Refutation
        • R(c);XS(F)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(e);P-FLIGHT,XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(I)
      • Refutation
        • B(b);XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • K(e);P-FLIGHT,P_SPINR(c)::QAR2(I)
        • K(e);P-FLIGHT::QAB1(I)
        • R(g);SBLOCK,XP(G)::QAR1(I),XR(c)
      • Refutation
        • R(c);
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • K(e);P_SPINB(b),S_FLIGHT::B(H)+S(F)
      • K(e);P-FLIGHT,P_SPINR(c)::QAR2(I)
      • K(e);S_FLIGHT,XP(G)::R(E)+S(F),DCHECK
      • K(e);P-FLIGHT::QAB1(I)
      • R(g);SBLOCK,XP(G)::QAR1(I),XR(c)
      • R(c);SBLOCK::QAR2(I)
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