MESON Chess Problem Database

Problem Display
PID: 179069 (3r4/1q2PB2/8/1N1P3R/p1kN2R1/Pr6/1Pp1P3/2K1Q3 w - - 0 1)

Ellerman, Arnoldo

Magasinet, 1935

3r4/1q2PB2/8/1N1P3R/p1kN2R1/Pr6/1Pp1P3/2K1Q3

#2

12 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.d6#
    • 1...Qxb5
      • 2.Se6#
    • 1...Qb6
      • 2.d6#
    • 1...Qa7
      • 2.d6#
    • 1...Qc7
      • 2.d6#
    • 1...Qb8
      • 2.d6#
    • 1...Rxb2
      • 2.Qc3#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Rd3
      • 2.Qb4#
    • 1...Re3
      • 2.Qb4#
    • 1...Rf3
      • 2.Qb4#
    • 1...Rg3
      • 2.Qb4#
    • 1...Rh3
      • 2.Qb4#
    • 1...Rb4
      • 2.Qc3#
      • 2.Qxb4#
    • 1...Rxb5
      • 2.Qc3#
  • Tries
    • 1.Sxb3+?
      • 1...Kxb5
        • 2.Qa5#
      • 1...Kxb3!
    • 1.Sc6+?
      • 1...Kxb5
        • 2.Qa5#
      • 1...Kc5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Se6#
      • 1...Kc5
        • 2.Se6#
      • 1...Qxd5
        • 2.Qc7#
      • 1...Rxb2
        • 2.Qc3#
      • 1...Rxa3
        • 2.Sxa3#
      • 1...Rxb5
        • 2.Qc3#
      • 1...Rxd5
        • 2.Sd6#
      • 1...Qb6
        • 2.d6#
      • 1...Qa7
        • 2.d6#
      • 1...Qc7
        • 2.Qxc7#
        • 2.d6#
      • 1...Qb8
        • 2.d6#
      • 1...Rc3
        • 2.Qxc3#
        • 2.Qb4#
      • 1...Rd3
        • 2.Qb4#
      • 1...Re3
        • 2.Qb4#
      • 1...Rf3
        • 2.Qb4#
      • 1...Rg3
        • 2.Qb4#
      • 1...Rh3
        • 2.Qb4#
      • 1...Rb4
        • 2.Qxb4#
      • 1...Rg8
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD::B(L)+P(I)
    • Q(e);SBLOCK,XS(H)::R(G)+S(F)
    • R(b);N_GUARD,XP(C)::QAR1(B)
    • R(b);N_GUARD::QAR1(B),XR(b)
    • R(b);N_GUARD::QAR1(B)
    • R(b);N_GUARD,XS(H)::QAR1(B)
  • Tries
    • Try
      • S(F);CHECK,XR(b)
      • Vars
        • K(d);S_FLIGHT,XS(H)::QAR1(B)
      • Refutation
        • K(d);S_FLIGHT,XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(H)::QAR1(B)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • R(G)+S(F)
    • Vars
      • K(d);P-FLIGHT::S(F)
      • Q(e);N_GUARD,P_SPINQ(e),XP(I)::QAR(B)
      • R(b);N_GUARD,XP(C)::QAR1(B)
      • R(b);XP(E)::S(H),XR(b)
      • R(b);N_GUARD,XS(H)::QAR1(B)
      • R(f);N_GUARD,P_SPINR(f),XP(I)::S(H)
      • Q(e);N_GUARD::B(L)+P(I)
      • R(b);N_GUARD::QAR1(B)
      • R(b);N_GUARD::QAR1(B),XR(b)
      • R(f);N_GUARD::S(H)
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