MESON Chess Problem Database

Problem Display
PID: 198790 (6q1/3prn2/5Bnp/3p3r/b1P2k1p/1p1QN2P/3PK2P/1B6 w - - 0 1)

Ellerman, Arnoldo

La Strategie, 1921

6q1/3prn2/5Bnp/3p3r/b1P2k1p/1p1QN2P/3PK2P/1B6

#2

9 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rxe3+
      • 2.Qxe3#
      • 2.dxe3#
    • 1...Sge5
      • 2.Sxd5#
      • 2.Qd4#
    • 1...Sfe5
      • 2.Sg2#
      • 2.Qd4#
    • 1...Sg5
      • 2.Qf5#
  • Tries
    • 1.Kd1?
      • threat
        • 2.Sg2#
        • 2.Qf1#
      • 1...Kf3
        • 2.Qf1#
      • 1...Rxe3
        • 2.Qxe3#
      • 1...Rg5
        • 2.Qf1#
      • 1...Re4
        • 2.Qf1#
      • 1...Sge5
        • 2.Sxd5#
      • 1...Sf8
        • 2.Qf1#
      • 1...Sgh8
        • 2.Qf1#
      • 1...Sfe5
        • 2.Sg2#
      • 1...Sg5
        • 2.Sg2#
        • 2.Qf5#
      • 1...b2+!
    • 1.Bg5+?
      • 1...Ke5
        • 2.Qxd5#
      • 1...Kxg5
        • 2.Qf5#
      • 1...Sxg5
        • 2.Qf5#
      • 1...hxg5
        • 2.Qf5#
      • 1...Rxg5!
  • Keys
    • 1.Ke1!
      • threat
        • 2.Qf1#
      • 1...Rxe3+
        • 2.Qxe3#
      • 1...Kf3
        • 2.Qf1#
      • 1...Sge5
        • 2.Sxd5#
      • 1...Sfe5
        • 2.Sg2#
      • 1...Sg5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(f);N_GUARD::QAR1(E),XR(f)
    • S(k);S_CUTR(f)::QAR1(E)
  • Tries
    • Try
      • K(C);N_SPINS(F),S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(E)
        • R(j);OGATE,XS(F)::QAB1(E),XR(j)
        • R(f);::QAR(E)
        • R(j);::QAR(E)
        • S(g);S_CUTR(f)::S(F),XP(e)
        • S(g);::QAR(E)
        • S(k);::S(F)
      • Refutation
        • P(a);CHECK
    • Try
      • B(I);CHECK
      • Vars
        • K(c);N_PINS(F),S_FLIGHT::QAR1(E),XP(e)
        • K(c);S_FLIGHT,XB(I)::QAR1(E)
        • S(k);XB(I)::QAR1(E)
        • P(h);XB(I)::QAR1(E)
      • Refutation
        • R(f);XB(I)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAR(E)
    • Vars
      • R(j);CHECK,OGATE,XS(F)::QAB1(E),XR(j)
      • K(c);P-FLIGHT::QAR2(E)
      • S(g);N_PINS(F)::S(F),XP(e)
      • S(k);N_PINS(F)::S(F)
      • S(k);S_CUTR(f)::QAR1(E)
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