MESON Chess Problem Database

Problem Display
PID: 66034 (q4B2/2bp1p1B/Qp1p3R/2PkN3/4NP2/1n2PP2/r1R5/5bK1 w - - 0 1)

van Dooren, Rene

Die Schwalbe, 1987

q4B2/2bp1p1B/Qp1p3R/2PkN3/4NP2/1n2PP2/r1R5/5bK1

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qxb7#
    • 1...Qd8
      • 2.Qb7#
    • 1...Qe8
      • 2.Qb7#
    • 1...Qxf8
      • 2.Qb7#
    • 1...Rb2
      • 2.Qxa8#
    • 1...Rxc2
      • 2.Qxa8#
    • 1...Bg2
      • 2.Qc4#
    • 1...Bh3
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bd8
      • 2.Rxd6#
    • 1...Sxc5
      • 2.Sc3#
    • 1...bxc5
      • 2.Sc3#
    • 1...dxc5
      • 2.Sc3#
    • 1...dxe5
      • 2.Sc3#
    • 1...f5
      • 2.Bg8#
    • 1...f6
      • 2.Bg8#
  • Tries
    • 1.Bg8?
      • threat
        • 2.Bxf7#
      • 1...Qxf8
        • 2.Qb7#
      • 1...Sxc5
        • 2.Sc3#
      • 1...Qe8
        • 2.Qb7#
      • 1...Bh3
        • 2.Qc4#
      • 1...Sd4!
    • 1.Rd2+?
      • 1...Rxd2
        • 2.Qxa8#
      • 1...Bd3
        • 2.Qc4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Sxd2!
    • 1.Rc4?
      • threat
        • 2.Sc3#
      • 1...Bxc4
        • 2.Qxc4#
      • 1...f6
        • 2.Bg8#
      • 1...Rc2
        • 2.Qxa8#
      • 1...Rg2+!
    • 1.Qd3+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Qxb6?
      • threat
        • 2.Sc3#
      • 1...Bxb6
        • 2.Rxd6#
      • 1...dxe5
        • 2.Sf6#
      • 1...f6
        • 2.Bg8#
      • 1...Qa5
        • 2.Qb7#
      • 1...Rxc2!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Sf6#
      • 1...Rxc2
        • 2.Qxa8#
      • 1...dxe5
        • 2.Sc3#
      • 1...Qd8
        • 2.Qb7#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bd8
        • 2.Rxd6#
      • 1...f6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(j);N_GUARD::QAB(I),XQ(j)
    • Q(j);N_GUARD::QAB(I)
    • Q(j);N_GUARD,XB(L)::QAB(I)
    • R(b);N_GUARD::QAB(I),XQ(j)
    • R(b);N_GUARD,XR(B)::QAB(I),XQ(j)
    • B(a);N_GUARD::QAB1(I)
    • B(a);N_GUARD::QAB1(I),XB(a)
    • B(g);N_GUARD::R1(J),XP(f)
    • S(c);SBLOCK,XP(G)::S(E)
    • P(e);SBLOCK,XP(G)::S(E)
    • P(f);XP(G)::S(E)
    • P(f);XS(H)::S(E)
    • P(i);OGATEB::B(K)
  • Tries
    • Try
      • B(K);P_PINP(i)
      • Threat
        • B(K),XP(i)
      • Vars
        • Q(j);N_GUARD,XB(L)::QAB(I)
        • S(c);SBLOCK,XP(G)::S(E)
        • Q(j);N_GUARD::QAB(I)
        • B(a);N_GUARD::QAB1(I)
      • Refutation
        • S(c);
    • Try
      • R(B);CHECK
      • Vars
        • R(b);XR(B)::QAB(I),XQ(j)
        • B(a);P_SPINB(a)::QAB1(I)
        • S(c);N_GUARD,P_SPINS(c)::R1(B),XS(c)
      • Refutation
        • S(c);XR(B)
    • Try
      • R(B);
      • Threat
        • S(E)
      • Vars
        • B(a);OGATE,XR(B)::QAB1(I),XB(a)
        • P(i);OGATEB::B(K)
        • R(b);N_GUARD::QAB(I),XQ(j)
      • Refutation
        • R(b);CHECK
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(I),XS(c)
      • Refutation
        • B(a);XQ(I)
    • Try
      • Q(I);XP(e)
      • Threat
        • S(E)
      • Vars
        • B(g);N_GUARD,XQ(I)::R1(J),XP(f)
        • P(f);XS(H)::S(E)
        • P(i);OGATEB::B(K)
        • Q(j);N_GUARD::QAB(I)
      • Refutation
        • R(b);XR(B)
  • Actual
    • B(K);
    • Threat
      • S(E)
    • Vars
      • R(b);N_GUARD,XR(B)::QAB(I),XQ(j)
      • P(f);XS(H)::S(E)
      • Q(j);N_GUARD::QAB(I)
      • B(a);N_GUARD::QAB1(I),XB(a)
      • B(g);N_GUARD::R1(J),XP(f)
      • P(i);::S(E),XP(i)
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