MESON Chess Problem Database

Problem Display
PID: 225787 (7b/1N6/3Pr3/KP1kp3/Q1p1p2R/2PN3B/2P5/1q6 w - - 0 1)

Slagmolen, Cornelis

Praca, 1992

7b/1N6/3Pr3/KP1kp3/Q1p1p2R/2PN3B/2P5/1q6

#2

10 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sb4#
    • 1...Qxc2
      • 2.Sb4#
    • 1...Qa1
      • 2.Sb4#
    • 1...Qc1
      • 2.Sb4#
    • 1...Qd1
      • 2.Sb4#
    • 1...Qe1
      • 2.Sb4#
    • 1...Qf1
      • 2.Sb4#
    • 1...Qg1
      • 2.Sb4#
    • 1...Qh1
      • 2.Sb4#
    • 1...Qb4+
      • 2.Sxb4#
    • 1...Qxb5+
      • 2.Qxb5#
    • 1...cxd3
      • 2.Qxe4#
    • 1...exd3
      • 2.Qxc4#
    • 1...e3
      • 2.Qxc4#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qc5#
      • 1...Qb4+
        • 2.Sxb4#
      • 1...Qa2
        • 2.Sb4#
      • 1...Qa1
        • 2.Sb4#
      • 1...Qg1
        • 2.Sb4#
      • 1...Qxb5+!
  • Keys
    • 1.Rh5!
      • threat
        • 2.Sf4#
      • 1...Qb4+
        • 2.Sxb4#
      • 1...Qxb5+
        • 2.Qxb5#
      • 1...cxd3
        • 2.Qd4#
      • 1...exd3
        • 2.Bg2#
      • 1...e3
        • 2.Bg2#
      • 1...Qc1
        • 2.Sb4#
      • 1...Qf1
        • 2.Sb4#
      • 1...Rf6
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD,P_PINQ(E)::S(C)
    • Q(a);N_GUARD,XP(A)::S(C)
    • Q(a);N_GUARD::S(C)
    • Q(a);N_GUARD,P_PINP(B)::S(C)
    • Q(a);CHECK,N_GUARD::S(C),XQ(a)
    • Q(a);CHECK,OGATE,XP(H)::QAR2(E),XQ(a)
    • P(b);OGATE,XS(C)::QAB1(E),XP(c)
    • P(c);XS(C)::QAB1(E),XP(b)
    • P(c);::QAB1(E),XP(b)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • Q(a);CHECK,N_GUARD::S(C),XQ(a)
        • Q(a);N_GUARD,P_PINQ(E)::S(C)
        • Q(a);N_GUARD::S(C)
      • Refutation
        • Q(a);CHECK,XP(H)
  • Actual
    • R(F);P_PINP(e)
    • Threat
      • S(C)
    • Vars
      • Q(a);CHECK,N_GUARD::S(C),XQ(a)
      • Q(a);CHECK,OGATE,XP(H)::QAR2(E),XQ(a)
      • P(b);OGATE,XS(C)::QAR1(E)
      • P(c);OGATEB,XS(C)::B(D)
      • P(c);OGATEB::B(D)
      • Q(a);N_GUARD::S(C)
      • R(f);N_GUARD,S_CUTB(g)::R1(F),XP(e)
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