MESON Chess Problem Database

Problem Display
PID: 239472 (8/qPn4K/P1BPp3/Q1N5/2kpp2R/Pp3P2/nrbP1N1p/2R3b1 w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkelet, 1964

8/qPn4K/P1BPp3/Q1N5/2kpp2R/Pp3P2/nrbP1N1p/2R3b1

#2

13 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc1
      • 2.Qb4#
    • 1...Sc3
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sd5
      • 2.Qb5#
    • 1...Sxa6
      • 2.Qb5#
    • 1...Sa8
      • 2.Qb5#
    • 1...Se8
      • 2.Qb5#
    • 1...d3
      • 2.Rxe4#
    • 1...exf3+
      • 2.d3#
    • 1...e3+
      • 2.d3#
  • Tries
    • 1.Sfxe4?
      • threat
        • 2.d3#
      • 1...Sxc1
        • 2.Qb4#
        • 2.Qa4#
      • 1...d3
        • 2.Sf2#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Qxc5!
    • 1.Scxe4?
      • threat
        • 2.d3#
      • 1...Sxc1
        • 2.Qb4#
        • 2.Qa4#
      • 1...d3
        • 2.Sc5#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Bxf2!
    • 1.Sd7?
      • threat
        • 2.Se5#
      • 1...exf3+
        • 2.d3#
      • 1...e3+
        • 2.d3#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...e5
        • 2.Sxe5#
      • 1...d3!
    • 1.Bxe4?
      • threat
        • 2.d3#
      • 1...Sxc1
        • 2.Qb4#
      • 1...d3
        • 2.Bc6#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sb5!
    • 1.Qa4+?
      • 1...Sb4
        • 2.Qxb4#
      • 1...Kxc5!
  • Keys
    • 1.fxe4!
      • threat
        • 2.d3#
      • 1...Sxc1
        • 2.Qb4#
      • 1...Sb5
        • 2.Qxb5#
      • 1...d3
        • 2.e5#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • S(b);N_GUARD,N_SPINB(d),XR(A)::QAR1(G)
    • S(b);N_GUARD,N_SPINB(d)::QAR1(G)
    • S(b);N_GUARD::QAR1(G),XS(b)
    • S(l);N_GUARD,P_PINP(L)::QAB1(G),XS(l)
    • S(l);N_GUARD,P_PINP(L)::QAB1(G)
    • S(l);N_GUARD,P_PINP(L),XP(I)::QAB1(G)
    • P(h);OGATEB,P_SPINP(i)::R(F),XP(i)
    • P(i);CHECK,N_GUARD,P_SPINP(h),XP(E)::P(B)
    • P(i);CHECK,N_GUARD,P_SPINP(h)::P(B)
  • Tries
    • Try
      • S(C);P_SPINS(C),XP(i)
      • Threat
        • P(B)
      • Vars
        • P(h);N_PINS(C)::R(F)+S(C)
        • S(b);N_GUARD,N_SPINB(d)::QAR1(G)
        • S(b);N_GUARD::QAR1(G),XS(b)
      • Refutation
        • Q(k);XS(H)
    • Try
      • S(H);P_SPINS(H),XP(i)
      • Threat
        • P(B)
      • Vars
        • P(h);N_PINS(H)::R(F)+S(H)
        • S(b);N_GUARD,N_SPINB(d)::QAR1(G)
        • S(b);N_GUARD::QAR1(G),XS(b)
      • Refutation
        • B(a);XS(C)
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • P(i);CHECK,N_GUARD,P_SPINP(h),XP(E)::P(B)
        • P(i);CHECK,N_GUARD,P_SPINP(h)::P(B)
        • Q(k);N_GUARD::QAR1(G),XQ(k)
        • S(l);N_GUARD::QAB1(G),XS(l)
        • P(j);::S(H),XP(j)
      • Refutation
        • P(h);P_SPINP(i)
    • Try
      • B(J);P_SPINB(J),XP(i)
      • Threat
        • P(B)
      • Vars
        • S(b);N_GUARD,N_SPINB(d),XR(A)::QAR1(G)
        • P(h);N_PINB(J)::R(F)+B(J)
        • S(b);N_GUARD,N_SPINB(d)::QAR1(G)
        • S(b);N_GUARD::QAR1(G),XS(b)
      • Refutation
        • S(l);P_PINP(L)
    • Try
      • Q(G);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(G),XS(b)
      • Refutation
        • K(g);P-FLIGHT,XS(H)
  • Actual
    • P(E);P_SPINP(E),XP(i)
    • Threat
      • P(B)
    • Vars
      • S(b);N_GUARD,N_SPINB(d),XR(A)::QAR1(G)
      • S(l);N_GUARD::QAB1(G),XS(l)
      • P(h);N_PINP(E)::R(F)+P(E)
      • S(b);N_GUARD,N_SPINB(d)::QAR1(G)
      • S(b);N_GUARD::QAR1(G),XS(b)
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