MESON Chess Problem Database

Problem Display
PID: 157952 (1q2r3/2nrn3/1Rb4b/1pN2p1K/2p3p1/2P5/k2B3R/2QB4 w - - 0 1)

Apro, Laszlo

Schiffmann MT, 1931

1q2r3/2nrn3/1Rb4b/1pN2p1K/2p3p1/2P5/k2B3R/2QB4

#2

8 + 12

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Scd5
      • 2.Bf4#
      • 2.Ra6#
    • 1...Sa6
      • 2.Rxa6#
    • 1...Se6
      • 2.Ra6#
    • 1...Sa8
      • 2.Ra6#
    • 1...Sed5
      • 2.Be3#
  • Tries
    • 1.Be3+?
      • 1...Rd2
        • 2.Rxd2#
      • 1...Bg2!
    • 1.Bf4+?
      • 1...Rd2
        • 2.Rxd2#
      • 1...Bg2!
    • 1.Bg5+?
      • 1...Rd2
        • 2.Rxd2#
      • 1...Bg2!
    • 1.Bxh6+?
      • 1...Rd2
        • 2.Rxd2#
      • 1...Bg2!
    • 1.Qb1+?
      • 1...Ka3
        • 2.Qa1#
      • 1...Kxb1!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Sb4#
      • 1...Sxa6
        • 2.Rxa6#
      • 1...Scd5
        • 2.Bf4#
      • 1...Sed5
        • 2.Be3#
      • 1...b4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(h);N_GUARD::R(H),XS(h)
    • S(h);N_GUARD::R(H)
    • S(j);S_CUTB(f),S_CUTR(i)::R(D)+B(C)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::R(D),XR(i)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • B(C);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::R(D),XR(i)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • B(C);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::R(D),XR(i)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • B(C);CHECK,XB(g)
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::R(D),XR(i)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P_SPINP(d),S_FLIGHT,XQ(A)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • S(h);OGATE,XS(F)::R(H),XS(h)
      • S(h);S_CUTB(f),S_CUTR(i)::R(D)+B(C)
      • S(j);S_CUTB(f),S_CUTR(i)::R(D)+B(C)
      • P(d);::S(F),XP(d)
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