MESON Chess Problem Database

Problem Display
PID: 203341 (8/8/7b/2pr4/R1NkB3/PR4N1/PK1n1q1r/3Qn1B1 w - - 0 1)

Kraemer, Adolf Herrmann Rudolf Ferdinand

1st Prize, Westfalische Schachbund, 1924

8/8/7b/2pr4/R1NkB3/PR4N1/PK1n1q1r/3Qn1B1

#2

10 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Rd3#
    • 1...Sg2
      • 2.Rd3#
    • 1...Sd3+
      • 2.Rxd3#
    • 1...Sf3
      • 2.Rd3#
  • Tries
    • 1.Bxf2+?
      • 1...Be3
        • 2.Bxe3#
      • 1...Rxf2!
    • 1.Qc2?
      • threat
        • 2.Se2#
        • 2.Qc3#
      • 1...Sd3+
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...Qxg1
        • 2.Qc3#
      • 1...Sxc2
        • 2.Rd3#
      • 1...Sxb3
        • 2.Se2#
      • 1...Sxe4
        • 2.Se2#
      • 1...Qe3
        • 2.Qc3#
      • 1...Be3
        • 2.Qc3#
      • 1...Sb1
        • 2.Se2#
      • 1...Sf1
        • 2.Se2#
      • 1...Sdf3
        • 2.Se2#
      • 1...Sxc4+!
    • 1.Qxd2+?
      • 1...Sd3+
        • 2.Rxd3#
      • 1...Bxd2!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Kc1#
      • 1...Sd3+
        • 2.Rxd3#
      • 1...Sb1+
        • 2.Kxb1#
      • 1...Sf1+
        • 2.Kb1#
      • 1...Sxb3+
        • 2.Kxb3#
      • 1...Sdf3+
        • 2.Kb1#
      • 1...Sxc4+
        • 2.Kb1#
      • 1...Sxe4+
        • 2.Se2#
      • 1...Sc2
        • 2.Kxc2#
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::R1(F)
    • S(a);CHECK,N_GUARD,N_SPINS(b)::R1(F),XS(a)
  • Tries
    • Try
      • B(B);CHECK,XQ(c)
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::B(B),XB(h)
      • Refutation
        • R(d);XB(B)
    • Try
      • Q(A);N_PINS(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_SPINQ(c),XB(B)::QAB1(A)
        • S(a);N_GUARD,XQ(A)::R1(F)
        • S(b);P_PINQ(A),XR(F)::S(G)
        • S(b);P_PINQ(A),XB(J)::S(G)
        • Q(c);::QAB1(A)
        • B(h);N_SPINQ(c)::QAB1(A)
        • S(b);P_PINQ(A)::S(G)
      • Refutation
        • S(b);CHECK,P_PINQ(A),P_SPINS(b),XS(I)
    • Try
      • Q(A);CHECK,P_SPINQ(A),XS(b)
      • Vars
        • S(a);CHECK,N_GUARD,P_SPINS(a)::R1(F),XS(a)
      • Refutation
        • B(h);XQ(A)
  • Actual
    • Q(A);N_PINS(b)
    • Threat
      • QAB(A)+K(D)
    • Vars
      • S(a);CHECK,N_GUARD::R1(F),XS(a)
      • S(b);CHECK::QAB(A)+K(D),XS(b)
      • S(b);CHECK::QAB(A)+K(D)
      • S(b);CHECK,XR(F)::QAB(A)+K(D),XS(b)
      • S(b);CHECK,P_SPINS(b),XS(I)::QAB(A)+K(D)
      • S(b);CHECK,SBLOCK,XB(J)::S(G)
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