MESON Chess Problem Database

Problem Display
PID: 140744 (b7/p3Q1p1/r3P1p1/1R1pk1P1/2p1NpP1/4bK2/4N3/4R1B1 w - - 0 1)

Bosma, Rinke

Probleemblad, 1976

b7/p3Q1p1/r3P1p1/1R1pk1P1/2p1NpP1/4bK2/4N3/4R1B1

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qd6#
    • 1...Ra2
      • 2.Qd6#
    • 1...Ra3
      • 2.Qd6#
    • 1...Ra4
      • 2.Qd6#
    • 1...Ra5
      • 2.Qd6#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Bc1
      • 2.Bd4#
    • 1...Bd2
      • 2.Bd4#
    • 1...Bd4
      • 2.Bxd4#
    • 1...Bb6
      • 2.Qd6#
    • 1...Bc6
      • 2.Qd6#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sxc4#
        • 2.Sf7#
      • 1...Ra4
        • 2.Sf7#
      • 1...Rc6
        • 2.Sf7#
      • 1...Bc5
        • 2.Sd4#
        • 2.Sf7#
      • 1...c3
        • 2.Sc4#
        • 2.Sf7#
      • 1...Rxd6!
    • 1.Bxe3?
      • threat
        • 2.Bd4#
        • 2.Bxf4#
      • 1...Ra3
        • 2.Qd6#
      • 1...fxe3!
    • 1.Qc7+?
      • 1...Rd6
        • 2.Qxd6#
      • 1...Kxe6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sd7#
      • 1...d4+
        • 2.Sb7#
      • 1...Bxc5
        • 2.Sd4#
      • 1...Rd6
        • 2.Qxg7#
      • 1...Bc6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(f);N_GUARD::QAB1(J)
    • R(f);N_GUARD::QAB1(J),XR(f)
    • B(a);OGATE::B(B)
    • B(a);OGATE::B(B),XB(a)
    • B(a);S_CUTR(f)::QAB1(J)
    • B(j);S_CUTR(f)::QAB1(J)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);::S(E)
      • Refutation
        • R(f);XS(E)
    • Try
      • B(B);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);N_GUARD,P_PINB(B)::QAB1(J)
      • Refutation
        • P(c);XB(B)
    • Try
      • Q(J);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(J),XR(f)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,XP(I)
  • Actual
    • S(E);N_PINP(d)
    • Threat
      • S(E)
    • Vars
      • P(d);CHECK::R(G)+S(E)
      • B(a);XS(E)::R(A)+S(C)
      • R(f);SBLOCK::QAB(J),XP(i)
      • B(j);S_CUTR(f)::QAB(J)
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