MESON Chess Problem Database

Problem Display
PID: 251731 (8/2p5/2R1P2b/KN1k4/1P2p1N1/1p6/8/1Q6 w - - 0 1)

van Dijk, Nils Gustav Gerard

Probleemblad, 1982

8/2p5/2R1P2b/KN1k4/1P2p1N1/1p6/8/1Q6

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qxe4#
    • 1...e3
      • 2.Qh1#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qxe4#
      • 1...Kxc6
        • 2.Qxe4#
      • 1...e3
        • 2.Qe4#
      • 1...Ke5!
    • 1.Sf6+?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...Ke5!
    • 1.Sc3+?
      • 1...Kd4
        • 2.Qxe4#
      • 1...Kxc6!
    • 1.Rc4?
      • threat
        • 2.Qxe4#
      • 1...Kxc4
        • 2.Qxe4#
      • 1...e3
        • 2.Qe4#
      • 1...Kxe6!
    • 1.Ra6?
      • threat
        • 2.Qxb3#
      • 1...Kc4
        • 2.Qxe4#
      • 1...b2
        • 2.Qa2#
      • 1...e3
        • 2.Qd3#
      • 1...c5!
    • 1.Rd6+?
      • 1...Kc4
        • 2.Se5#
        • 2.Rd4#
        • 2.Qxe4#
        • 2.Qf1#
      • 1...cxd6!
    • 1.Qc2?
      • threat
        • 2.Qc4#
        • 2.Qc5#
      • 1...Be3
        • 2.Qc4#
      • 1...Bf8
        • 2.Qc4#
      • 1...e3
        • 2.Qg2#
        • 2.Qc4#
      • 1...bxc2!
    • 1.Qd3+?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...exd3!
    • 1.Qc1?
      • threat
        • 2.Qc4#
        • 2.Qc5#
      • 1...e3
        • 2.Qh1#
        • 2.Qc4#
      • 1...Be3
        • 2.Qc4#
      • 1...Bf8
        • 2.Qc4#
      • 1...Bxc1!
  • Keys
    • 1.Rxc7!
      • threat
        • 2.Qxb3#
      • 1...Kxe6
        • 2.Qxe4#
      • 1...b2
        • 2.Qa2#
      • 1...e3
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);N_GUARD,S_FLIGHT,XR(F)::QAB(A),XP(b)
    • P(b);OGATEB::QAB(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAB(A),XP(b)
        • P(b);::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAB(A),XP(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XR(F)
    • Try
      • R(F);
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAR2(A),XP(b)
        • P(b);::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT,XP(G)
    • Try
      • R(F);
      • Threat
        • QAB(A),XP(a)
      • Vars
        • K(c);N_GUARD,S_FLIGHT::QAR2(A),XP(b)
        • P(a);OGATEB::QAB(A)
        • P(b);N_GUARD::QAR2(A)
      • Refutation
        • P(e);
    • Try
      • R(F);CHECK
      • Refutation
        • P(e);XR(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);::QAB1(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);N_GUARD,S_FLIGHT,XR(F)::QAB(A),XP(b)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);::QAB1(A)
      • Refutation
        • B(d);XQ(A)
  • Actual
    • R(F);XP(e)
    • Threat
      • QAB(A),XP(a)
    • Vars
      • K(c);N_GUARD,S_FLIGHT,XP(G)::QAR2(A),XP(b)
      • P(a);OGATEB::QAB(A)
      • P(b);OGATE::QAR2(A)
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