MESON Chess Problem Database

Problem Display
PID: 225826 (2K3bN/3N4/1p2kP1n/R7/2P5/b2p4/2n4B/3Qr3 w - - 0 1)

van Dijk, Nils Gustav Gerard

Praca, 1958

2K3bN/3N4/1p2kP1n/R7/2P5/b2p4/2n4B/3Qr3

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qxe1#
    • 1...Sb4
      • 2.Qxe1#
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sf7
      • 2.Qg4#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qd5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Se3
        • 2.Qe4#
      • 1...Sb4
        • 2.Sf8#
      • 1...Re5!
    • 1.Qg4+?
      • 1...Sf5
        • 2.Qxf5#
        • 2.Qxg8#
      • 1...Sxg4!
    • 1.Qxe1+?
      • 1...Se3
        • 2.Qxe3#
      • 1...Sxe1!
    • 1.Qxd3?
      • threat
        • 2.Qd5#
      • 1...Rd1
        • 2.Re5#
        • 2.Qe4#
      • 1...Re5
        • 2.Rxe5#
      • 1...Se3
        • 2.Re5#
        • 2.Qe4#
      • 1...Sb4
        • 2.Qd6#
      • 1...Sd4!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qd5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Se3
        • 2.Qe5#
      • 1...Sb4
        • 2.Qe8#
      • 1...Sf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::QAR(A),XR(a)
    • S(g);N_GUARD::QAB(A),XS(g)
    • S(g);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(a);N_GUARD::QAR2(A),XR(a)
        • S(b);S_CUTR(a)::QAR2(A)
        • S(b);S_CUTB(c)::S(F)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • S(g);XQ(A)
    • Try
      • Q(A);CHECK,XR(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR(A),XS(b)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);XP(d)
      • Threat
        • QAB1(A)
      • Vars
        • R(a);N_GUARD::R1(D),XR(a)
        • S(b);S_CUTB(c)::QAR1(A)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(a);N_GUARD::QAR1(A),XR(a)
      • S(b);S_CUTR(a)::QAR1(A)
      • S(b);S_CUTB(c)::QAR2(A)
      • S(g);N_GUARD::QAB1(A),XS(g)
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