MESON Chess Problem Database

Problem Display
PID: 156038 (3b4/qB6/N1R5/1Rpk4/1P2nP2/KPr1P3/Q7/8 w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkvilag, 1932

3b4/qB6/N1R5/1Rpk4/1P2nP2/KPr1P3/Q7/8

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Rcxb6#
    • 1...Qxa6+
      • 2.Rxa6#
    • 1...Rxb3+
      • 2.Qxb3#
    • 1...Rc4
      • 2.bxc4#
  • Tries
    • 1.Qd2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Sxd2!
  • Keys
    • 1.bxc5!
      • threat
        • 2.Rd6#
      • 1...Qxc5+
        • 2.Sb4#
      • 1...Qxa6+
        • 2.Rxa6#
      • 1...Rxb3+
        • 2.Qxb3#
      • 1...Qxb7
        • 2.Sb4#
      • 1...Rxc5
        • 2.b4#
      • 1...Sxc5
        • 2.Qg2#
      • 1...Sd6
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_GUARD,N_PINS(H)::B(J)+R(I),XQ(e)
    • Q(e);CHECK,OGATE,XS(H)::B(J)+R(I),XQ(e)
    • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
    • R(a);N_PINP(C)::P(C),XR(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(A),XR(a)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • P(E);XP(c)
    • Threat
      • B(J)+R(I),DCHECK
    • Vars
      • Q(e);CHECK,N_PINS(H),P_SPINQ(e),XP(E)::S(H)
      • Q(e);CHECK,OGATE,XS(H)::B(J)+R(I),XQ(e)
      • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
      • Q(e);N_PINS(H),XB(J)::S(H)
      • R(a);N_PINP(C),P_SPINR(a),XP(E)::QAB(A)+P(C)
      • S(b);OGATEB,P_SPINS(b),XP(E)::QAB(A)
      • S(b);::B(J)+R(I),DCHECK,XS(b)
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