MESON Chess Problem Database

Problem Display
PID: 210567 (7b/3p2n1/Rq1P4/1N1kp3/3P4/6N1/2R1B2K/2Q5 w - - 0 1)

van der Weerd, JAM

Deutsche Schachblatter, 1942

7b/3p2n1/Rq1P4/1N1kp3/3P4/6N1/2R1B2K/2Q5

#2

9 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Sc7#
    • 1...Qa5
      • 2.Bc4#
    • 1...Qa7
      • 2.Bc4#
    • 1...Qd8
      • 2.Bc4#
    • 1...Qxd6
      • 2.Bc4#
      • 2.Rxd6#
    • 1...Qb7
      • 2.Bc4#
    • 1...Qb8
      • 2.Bc4#
  • Tries
    • 1.Sc7+?
      • 1...Kxd4
        • 2.Rc4#
        • 2.Qd2#
        • 2.Qg1#
      • 1...Kxd6
        • 2.Qa3#
      • 1...Qxc7!
    • 1.Qe3?
      • threat
        • 2.Qb3#
        • 2.Qxe5#
      • 1...Qxd4
        • 2.Sc7#
      • 1...Qxb5
        • 2.Qxe5#
      • 1...Qxd6
        • 2.Bc4#
        • 2.Rxd6#
        • 2.Qb3#
      • 1...exd4
        • 2.Bf3#
        • 2.Qe4#
      • 1...Qc5
        • 2.Qxe5#
      • 1...Qc7
        • 2.Sxc7#
        • 2.Qxe5#
      • 1...Qc6
        • 2.Qxe5#
      • 1...Sf5
        • 2.Qb3#
      • 1...Sh5
        • 2.Qb3#
      • 1...Se6
        • 2.Qb3#
        • 2.Qe4#
      • 1...Se8
        • 2.Qb3#
      • 1...e4
        • 2.Qb3#
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qh1+?
      • 1...e4
        • 2.Qxe4#
      • 1...Ke6!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qxe5#
      • 1...Ke6
        • 2.Bc4#
      • 1...Qxd4
        • 2.Sc7#
      • 1...Qxd6
        • 2.Bc4#
        • 2.Rxd6#
      • 1...Sf5
        • 2.Qg8#
      • 1...Sh5
        • 2.Qg8#
      • 1...Se6
        • 2.Bf3#
      • 1...Se8
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD,SBLOCK,XP(F)::S(G)
    • Q(c);::B(C)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINQ(c),XP(I)::QAB(A)
      • Refutation
        • Q(c);XS(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_GUARD,XP(F)::S(G)
        • Q(c);XS(G)::QAR1(A),XP(b)
        • Q(c);::QAR1(A),XP(b)
        • S(e);::QAB(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAB1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);P_PINP(b)
    • Threat
      • QAR1(A),XP(b)
    • Vars
      • K(a);N_SPINP(b),S_FLIGHT::B(C)
      • Q(c);N_GUARD,SBLOCK,XP(F)::S(G)
      • S(e);N_SPINP(b),OGATE::QAB(A)
      • S(e);OGATE::QAB(A)
      • S(e);SBLOCK::B(C)
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