MESON Chess Problem Database

Problem Display
PID: 158474 (8/7B/2p1RQ2/2Pk1bnR/Nb3q2/1PpprN2/K3pBr1/8 w - - 0 1)

Bosma, Rinke

4th Comm., Schakend Nederland, 1981

8/7B/2p1RQ2/2Pk1bnR/Nb3q2/1PpprN2/K3pBr1/8

#2

10 + 11

102 Probleemblad 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Rd6#
    • 1...Rxf3
      • 2.Sb6#
    • 1...Re4
      • 2.Sb6#
    • 1...Bxc5
      • 2.Sxc3#
  • Tries
    • 1.Sxc3+?
      • 1...Kxc5
        • 2.Rxc6#
      • 1...Bxc3!
    • 1.Qd8+?
      • 1...Qd6
        • 2.Qxd6#
      • 1...Kxe6!
    • 1.Qxf5+?
      • 1...Qe5
        • 2.Rd6#
      • 1...Re5
        • 2.Sb6#
        • 2.Rd6#
      • 1...Qxf5!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qd4#
      • 1...Kxe4
        • 2.Qxc6#
      • 1...Qxe4
        • 2.Qd6#
      • 1...Rxe4
        • 2.Sb6#
      • 1...Bxc5
        • 2.Sxc3#
      • 1...Bxe4
        • 2.Bg8#
      • 1...Sxf3
        • 2.Qe6#
      • 1...Sxe4
        • 2.Qf7#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(g);N_GUARD,SBLOCK::R1(H)
    • R(e);XS(D)::S(E)
    • R(e);::S(E)
    • B(f);N_GUARD,SBLOCK,XP(F)::S(E),XP(c)
  • Tries
    • Try
      • S(E);CHECK,XP(c)
      • Vars
        • K(h);P-FLIGHT,P_SPINR(e),XP(F)::R1(H),XP(k)
      • Refutation
        • B(f);XS(E)
    • Try
      • Q(I);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::QAR1(I),XQ(g)
      • Refutation
        • K(h);S_FLIGHT,XR(H)
    • Try
      • Q(I);CHECK,XB(i)
      • Vars
        • Q(g);P_SPINQ(g)::R1(H)
      • Refutation
        • Q(g);XQ(I)
  • Actual
    • R(H);
    • Threat
      • QAR1(I)
    • Vars
      • K(h);P_SPINB(i),S_FLIGHT,XR(H)::QAB(I),XP(k)
      • Q(g);N_GUARD,SBLOCK,XR(H)::QAR1(I)
      • R(e);SBLOCK,XR(H)::S(E)
      • B(f);N_GUARD,SBLOCK,XP(F)::S(E),XP(c)
      • B(i);N_GUARD,P_SPINS(j),SBLOCK,XR(H)::B(J)
      • S(j);N_GUARD,P_SPINB(i),XS(D)::QAB1(I)
      • S(j);N_GUARD,P_SPINB(i),SBLOCK,XR(H)::QAB(I)
      • Q(g);N_GUARD::QAR1(I),XQ(g)
      • S(j);N_GUARD,P_SPINB(i)::QAB1(I),XS(j)
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