MESON Chess Problem Database

Problem Display
PID: 141538 (8/3K1Npb/3pPp1b/2p5/2r1k3/2rR1RP1/2Q1B3/4qN2 w - - 0 1)

den Toom, Bas

Probleemblad, 1977

8/3K1Npb/3pPp1b/2p5/2r1k3/2rR1RP1/2Q1B3/4qN2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg3
      • 2.Sxg3#
    • 1...Ra3
      • 2.Qxc4#
    • 1...Rb3
      • 2.Qxc4#
    • 1...Rxd3
      • 2.Qxd3#
    • 1...Bf4
      • 2.Rxf4#
  • Tries
    • 1.Rd1+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxc2!
    • 1.Rd2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxc2!
    • 1.Rxd6+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxc2!
    • 1.Rfe3+?
      • 1...Kf5
        • 2.Rd5#
      • 1...Bxe3!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Sxd6#
      • 1...Kxf5
        • 2.Rd5#
      • 1...Qxg3
        • 2.Sxg3#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...Bxf5
        • 2.Bf3#
      • 1...Rd4
        • 2.Re3#
      • 1...Bf4
        • 2.Rxf4#
      • 1...d5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(a);XP(F)::S(A),XQ(a)
    • R(b);OGATE::QAR2(B),XR(c)
    • R(b);OGATE,P_SPINR(b),XR(D)::QAB1(B),XR(b)
    • B(h);N_GUARD::R1(E),XB(h)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(B),XR(b)
      • Refutation
        • R(b);XQ(B)
    • Try
      • R(D);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(B),XR(b)
      • Refutation
        • R(b);XQ(B)
    • Try
      • R(D);CHECK,XP(f)
      • Vars
        • R(b);N_GUARD,P_PINR(D),P_SPINR(b)::QAB1(B),XR(b)
      • Refutation
        • R(b);XQ(B)
    • Try
      • R(E);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB(B)+R(D),DCHECK
      • Refutation
        • B(h);XR(E)
  • Actual
    • R(E);
    • Threat
      • S(I),XP(f)
    • Vars
      • K(d);S_FLIGHT,XR(E)::QAB(B)+R(D),DCHECK
      • Q(a);XP(F)::S(A),XQ(a)
      • R(b);OGATE,P_SPINR(b),XR(D)::QAB1(B),XR(b)
      • B(j);P_PINP(G),SBLOCK,XR(E)::B(C)
      • R(c);SBLOCK::QAB(B)+R(D),DCHECK
      • B(h);N_GUARD::R1(E),XB(h)
      • P(f);::S(I)
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