MESON Chess Problem Database

Problem Display
PID: 120725 (5B2/n7/Bp2R1K1/1r3Q2/p1kp4/2qR4/2rp4/3N4 w - - 0 1)

Schmer, L

Warszawa Probl., 1933

5B2/n7/Bp2R1K1/1r3Q2/p1kp4/2qR4/2rp4/3N4

#2

7 + 9

6490 yacpdb 2009
14868 Pirnie Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qxb5#
    • 1...Sc8
      • 2.Qxb5#
  • Tries
    • 1.Se3+?
      • 1...dxe3
        • 2.Qd5#
      • 1...Kb3!
    • 1.Bxb5+?
      • 1...Kb3
        • 2.Qd5#
      • 1...Sxb5!
    • 1.Rc6+?
      • 1...Sxc6
        • 2.Qxb5#
      • 1...Kb3!
    • 1.Qd5+?
      • 1...Kxd3
        • 2.Sf2#
        • 2.Re3#
      • 1...Kxd5!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Ree3#
      • 1...Qxd3+
        • 2.Re4#
      • 1...Kb3
        • 2.Rxb6#
      • 1...Kxd3
        • 2.Qf1#
      • 1...Kd5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(i);N_GUARD::QAB1(C),XR(g)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • P(f);XS(A)::QAB1(C)
      • Refutation
        • K(e);N_SPINR(g),P_SPINQ(c),S_FLIGHT
    • Try
      • B(D);CHECK,XR(g)
      • Vars
        • K(e);P_SPINQ(c),S_FLIGHT::QAB(C)
      • Refutation
        • S(i);XB(D)
    • Try
      • R(E);CHECK
      • Vars
        • S(i);XR(E)::QAB1(C),XR(g)
      • Refutation
        • K(e);N_SPINR(g),P_SPINQ(c),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(e);N_SPINR(g),P_SPINP(f),S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+R(E)
    • Vars
      • Q(c);CHECK,SBLOCK,XR(B)::QAB(C)+R(E)
      • K(e);N_SPINR(g),P_SPINQ(c),S_FLIGHT::QAB(C)+R(E),XP(h)
      • K(e);OGATEB,S_FLIGHT,XR(B)::QAB(C)
      • K(e);N_SPINR(g),P_SPINP(f),S_FLIGHT::S(A)
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