MESON Chess Problem Database

Problem Display
PID: 254426 (4B1K1/1qp2Q2/1P2P1N1/R3P1r1/1p2k3/1N3Rpn/2nP2P1/2r2b2 w - - 0 1)

den Toom, Cornelis

Probleemblad, 1983

4B1K1/1qp2Q2/1P2P1N1/R3P1r1/1p2k3/1N3Rpn/2nP2P1/2r2b2

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Bc6#
    • 1...Qc6
      • 2.Bxc6#
    • 1...Qa7
      • 2.Bc6#
    • 1...Rg4
      • 2.Qf5#
    • 1...Rxe5
      • 2.Rxe5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rxg6+
      • 2.Qxg6#
    • 1...Bxg2
      • 2.d3#
    • 1...Sa1
      • 2.Re3#
    • 1...Se1
      • 2.Re3#
    • 1...Sa3
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sd4
      • 2.Re3#
    • 1...Sg1
      • 2.Qf4#
    • 1...Sf2
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...cxb6
      • 2.Qxb7#
    • 1...c5
      • 2.Qxb7#
  • Tries
    • 1.Rf4+?
      • 1...Kd3
        • 2.Bb5#
      • 1...Sxf4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sc5#
      • 1...Rxg6+
        • 2.Bxg6#
      • 1...Qxb6
        • 2.Qd5#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Bxg2
        • 2.Qd3#
      • 1...cxb6
        • 2.Qxb7#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Sa1
        • 2.Qd4#
      • 1...Se1
        • 2.Qd4#
      • 1...Sa3
        • 2.Qd4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...c5
        • 2.Sxc5#
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 9
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(i);N_GUARD::B(K)
    • Q(i);N_GUARD::B(K),XQ(i)
    • R(h);N_GUARD::QAB1(J)
    • R(h);N_PINS(I),OGATE,XP(F)::R1(E),XR(h)
    • R(h);N_GUARD,N_PINS(I)::QAB1(J),XR(h)
    • R(h);CHECK,OGATE,XS(I)::QAB(J),XR(h)
    • B(b);N_GUARD,XP(B)::P(A)
    • S(c);N_GUARD::R1(D)
    • S(c);N_GUARD::R1(D),XS(c)
    • S(e);N_GUARD::QAR1(J)
    • S(e);N_GUARD::QAR1(J),XS(e)
    • P(j);OGATE,XP(G)::QAB(J),XQ(i)
    • P(j);OGATE::QAB(J),XQ(i)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(g);N_GUARD,S_CUTS(e),S_FLIGHT::B(K)
      • Refutation
        • S(e);XR(D)
  • Actual
    • Q(J);
    • Threat
      • S(C)
    • Vars
      • R(h);CHECK,OGATE,XS(I)::B(K),XR(h)
      • Q(i);N_GUARD,XP(G)::QAB1(J)
      • R(h);N_PINS(I),OGATE,XP(F)::R1(E),XR(h)
      • B(b);N_GUARD,XP(B)::QAB1(J)
      • P(j);OGATE,XP(G)::QAB(J),XQ(i)
      • S(e);N_GUARD::R1(D),XS(e)
      • Q(i);N_GUARD,P_PINP(H)::QAB1(J),XQ(i)
      • Q(i);N_GUARD::QAB(J),XQ(i)
      • S(c);N_GUARD::QAR1(J)
      • S(c);N_GUARD::QAR1(J),XS(c)
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Developed and maintained by Brian Stephenson.
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