MESON Chess Problem Database

Problem Display
PID: 119803 (8/3p4/p1pP4/B1K5/Q7/5B2/3PPN2/4krb1 w - - 0 1)

Schuld, Henk L

Alkmaarsche Courant, 1912

8/3p4/p1pP4/B1K5/Q7/5B2/3PPN2/4krb1

#2

8 + 6

6490 yacpdb 2009
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf2
      • 2.Qh4#
    • 1...Rxf2
      • 2.Qa1#
    • 1...Bxf2+
      • 2.d4#
    • 1...Bh2
      • 2.Sd3#
  • Tries
    • 1.Kc4?
      • threat
        • 2.Sd3#
      • 1...Rxf2
        • 2.Qa1#
      • 1...Bxf2
        • 2.Qa1#
        • 2.d3#
        • 2.d4#
      • 1...Kxf2!
    • 1.Bg4?
      • 1...Bxf2+
        • 2.d4#
      • 1...Rxf2
        • 2.Qa1#
      • 1...Bh2
        • 2.Sd3#
      • 1...Kxf2!
    • 1.Bh5?
      • 1...Bxf2+
        • 2.d4#
      • 1...Rxf2
        • 2.Qa1#
      • 1...Bh2
        • 2.Sd3#
      • 1...Kxf2!
    • 1.Bc3?
      • 1...Bxf2+
        • 2.d4#
      • 1...Kxf2
        • 2.Qh4#
      • 1...Rxf2
        • 2.Qa1#
      • 1...Bh2
        • 2.Sd3#
      • 1...a5!
    • 1.Qc2?
      • 1...Bxf2+
        • 2.d4#
      • 1...Rxf2
        • 2.Qb1#
        • 2.Qc1#
      • 1...Bh2
        • 2.Sd3#
      • 1...Kxf2!
    • 1.Qb3?
      • 1...Bxf2+
        • 2.d4#
      • 1...Rxf2
        • 2.Qb1#
      • 1...Bh2
        • 2.Sd3#
      • 1...Kxf2!
    • 1.Qd4?
      • threat
        • 2.d3#
      • 1...Rxf2
        • 2.Qa1#
      • 1...Bxf2!
    • 1.e3?
      • threat
        • 2.Sd3#
      • 1...Rxf2
        • 2.Qd1#
        • 2.Qa1#
      • 1...Bxf2
        • 2.Qd1#
        • 2.Qa1#
        • 2.d3#
        • 2.d4#
      • 1...Kxf2!
    • 1.e4?
      • 1...Bxf2+
        • 2.d4#
      • 1...Rxf2
        • 2.Qd1#
        • 2.Qa1#
      • 1...Bh2
        • 2.Sd3#
      • 1...Kxf2!
  • Keys
    • 1.Kb6!
      • 1...Bxf2+
        • 2.d4#
      • 1...Kxf2
        • 2.Qh4#
      • 1...Rxf2
        • 2.Qa1#
      • 1...Bh2
        • 2.Sd3#
      • 1...c5
        • 2.Sd3#

This anticipates 20893(1913)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XS(C)::QAB(E)
    • R(b);SBLOCK,XS(C)::QAR(E)
    • B(c);CHECK,SBLOCK,XS(C)::B(F)+P(A)
    • B(c);N_PINS(C)::S(C)
  • Tries
    • Try
      • K(G);N_SPINS(C),P-FLIGHT
      • Threat
        • S(C)
      • Vars
        • R(b);SBLOCK,XS(C)::QAR(E)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • B(D);
      • Vars
        • B(c);CHECK,SBLOCK,XS(C)::B(F)+P(A)
        • R(b);SBLOCK,XS(C)::QAR(E)
        • B(c);N_PINS(C)::S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • B(D);
      • Vars
        • B(c);CHECK,SBLOCK,XS(C)::B(F)+P(A)
        • R(b);SBLOCK,XS(C)::QAR(E)
        • B(c);N_PINS(C)::S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • B(F);
      • Vars
        • B(c);CHECK,SBLOCK,XS(C)::B(F)+P(A)
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB(E)
        • R(b);SBLOCK,XS(C)::QAR(E)
        • B(c);N_PINS(C)::S(C)
      • Refutation
        • P(d);
    • Try
      • Q(E);
      • Vars
        • B(c);CHECK,SBLOCK,XS(C)::B(F)+P(A)
        • B(c);N_PINS(C)::S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(E);
      • Vars
        • B(c);CHECK,SBLOCK,XS(C)::B(F)+P(A)
        • R(b);SBLOCK,XS(C)::QAR(E)
        • B(c);N_PINS(C)::S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(E);N_SPINS(C)
      • Threat
        • B(F)+P(A)
      • Vars
        • R(b);SBLOCK,XS(C)::QAR(E)
      • Refutation
        • B(c);P_PINQ(E),XS(C)
    • Try
      • P(B);N_SPINS(C)
      • Threat
        • S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • P(B);
      • Vars
        • B(c);CHECK,SBLOCK,XS(C)::B(F)+P(A)
        • B(c);N_PINS(C)::S(C)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • K(G);S_FLIGHT
    • Vars
      • B(c);CHECK,SBLOCK,XS(C)::B(F)+P(A)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB(E)
      • R(b);SBLOCK,XS(C)::QAR(E)
      • B(c);N_PINS(C)::S(C)
      • P(e);N_PINS(C)::S(C)
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