MESON Chess Problem Database

Problem Display
PID: 201540 (1q6/1p6/1R2p2r/N1nkB1QR/8/n5p1/KbP1PN2/8 w - - 0 1)

Stanek, Tomas

3rd HM., Arbeiter Zeitung, 1922

1q6/1p6/1R2p2r/N1nkB1QR/8/n5p1/KbP1PN2/8

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qa7
      • 2.Rd6#
    • 1...Qa8
      • 2.Rd6#
    • 1...Qc8
      • 2.Rd6#
    • 1...Qe8
      • 2.Rd6#
    • 1...Qg8
      • 2.Rd6#
    • 1...Qh8
      • 2.Rd6#
    • 1...Sb1
      • 2.c4#
    • 1...Sb5
      • 2.c4#
  • Tries
    • 1.Bxb2+?
      • 1...Qe5
        • 2.Qxe5#
      • 1...e5!
    • 1.Bc3+?
      • 1...Qe5
        • 2.Qxe5#
      • 1...e5!
    • 1.Bd4+?
      • 1...Kxd4
        • 2.Qxc5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...e5!
    • 1.Bd6+?
      • 1...Kd4
        • 2.Qxc5#
        • 2.Qe5#
      • 1...Be5
        • 2.Qxe5#
      • 1...e5!
    • 1.Bc7+?
      • 1...Kd4
        • 2.Qxc5#
        • 2.Qe5#
      • 1...Be5
        • 2.Rd6#
        • 2.Qxe5#
      • 1...e5!
    • 1.Bxb8+?
      • 1...Kd4
        • 2.Qxc5#
        • 2.Qe5#
      • 1...Be5
        • 2.Rd6#
        • 2.Qxe5#
      • 1...e5!
    • 1.Qd2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sd3!
  • Keys
    • 1.Rb5!
      • threat
        • 2.e4#
      • 1...Qxe5
        • 2.Qd8#
      • 1...Bxe5
        • 2.Qd2#
      • 1...Sxb5
        • 2.c4#
      • 1...gxf2
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(i);N_GUARD::R1(I),XQ(i)
    • Q(i);N_GUARD::R1(I)
    • S(b);N_GUARD::P(B)
  • Tries
    • Try
      • B(F);CHECK,XB(a)
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAR1(G),XQ(i)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • B(F);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAR1(G),XQ(i)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • B(F);CHECK
      • Vars
        • K(e);OGATE,P-FLIGHT,XB(F)::QAB1(G),XS(d)
        • Q(i);N_GUARD,P_SPINQ(i)::QAR1(G),XQ(i)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • B(F);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(G),XB(a)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • B(F);CHECK
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • B(F);CHECK,XQ(i)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(G);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(G),XB(a)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • R(I);P_PINS(d)
    • Threat
      • P(C)
    • Vars
      • Q(i);N_GUARD,P_SPINQ(i),XB(F)::QAR(G)
      • B(a);N_GUARD,P_SPINB(a),XB(F)::QAR(G)
      • S(b);N_GUARD,N_SPINS(d),XR(I)::P(B)
      • P(c);OGATE,XS(D)::QAB(G)
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