MESON Chess Problem Database

Problem Display
PID: 237749 (8/2p3B1/1rp3QK/bP3P2/rk1N4/p1Np1p2/B1pp4/8 w - - 0 1)

Ellerman, Arnoldo

Arbejder-Skak, 1953

8/2p3B1/1rp3QK/bP3P2/rk1N4/p1Np1p2/B1pp4/8

#2

8 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Sd5#
  • Tries
    • 1.Sxc2+?
      • 1...Kc5
        • 2.Bf8#
      • 1...dxc2!
    • 1.Sxc6+?
      • 1...Kc5
        • 2.Bf8#
      • 1...Rxc6!
    • 1.Bf8+?
      • 1...c5
        • 2.Sd5#
      • 1...Kxc3!
    • 1.Qxc6?
      • threat
        • 2.Sd5#
        • 2.Bf8#
      • 1...Rxb5
        • 2.Qc4#
      • 1...Rb8
        • 2.Sd5#
        • 2.Qc4#
      • 1...Rxc6+!
    • 1.Qd6+?
      • 1...Kxc3
        • 2.Se2#
      • 1...c5
        • 2.Sd5#
      • 1...cxd6!
    • 1.Qe6?
      • threat
        • 2.Qc4#
      • 1...Kxc3
        • 2.Qb3#
      • 1...Kc5
        • 2.Qe7#
      • 1...c5
        • 2.Sd5#
      • 1...cxb5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Sb3#
        • 2.Se6#
      • 1...cxb5+
        • 2.Se6#
      • 1...c5+
        • 2.Sc6#
      • 1...Kxc3
        • 2.Se2#
      • 1...Kc5
        • 2.Bf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(j);N_GUARD,P_PINQ(F),SBLOCK::S(B)
  • Tries
    • Try
      • S(C);CHECK,XP(a)
      • Vars
        • K(g);S_FLIGHT::B(H)
      • Refutation
        • P(d);XS(C)
    • Try
      • S(C);CHECK,XP(j)
      • Vars
        • K(g);S_FLIGHT::B(H)
      • Refutation
        • R(i);P_PINQ(F),XS(C)
    • Try
      • B(H);CHECK
      • Vars
        • P(j);P_PINQ(F),P_SPINP(j)::S(B)
      • Refutation
        • K(g);S_FLIGHT,XS(B)
    • Try
      • Q(F);P_SPINQ(F),XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);N_PINQ(F),XP(D)::QAR1(F)
      • Refutation
        • R(i);CHECK,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(g);S_FLIGHT,XS(B)::B(H)+S(C),DCHECK
        • P(j);P_PINQ(F),P_SPINP(j)::S(B)
      • Refutation
        • P(k);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(g);S_FLIGHT,XS(B)::QAR1(F)
        • K(g);S_FLIGHT::QAB(F)
        • P(j);N_GUARD,P_PINQ(F),SBLOCK::S(B)
      • Refutation
        • P(j);P_PINQ(F),XP(D)
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • P(j);CHECK,XP(D)::QAR(F)+S(C)
      • P(j);CHECK,SBLOCK::QAR(F)+S(C),DCHECK
      • K(g);S_FLIGHT,XS(B)::B(H)+S(C),DCHECK
      • K(g);S_FLIGHT::B(H)
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