MESON Chess Problem Database

Problem Display
PID: 241620 (8/Q3pN1n/4kN1R/2P5/4B1pK/p3R2p/1r2pr2/B1b5 w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkvilag, 1936

8/Q3pN1n/4kN1R/2P5/4B1pK/p3R2p/1r2pr2/B1b5

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sd8#
    • 1...Ra2
      • 2.Sd8#
    • 1...Rc2
      • 2.Sd8#
    • 1...Rd2
      • 2.Bg6#
    • 1...Rb3
      • 2.Sd8#
    • 1...Rb4
      • 2.Sd8#
    • 1...Rb5
      • 2.Sd8#
    • 1...Rb6
      • 2.Sd8#
    • 1...Rb7
      • 2.Sd8#
    • 1...Rf5
      • 2.Bd5#
  • Tries
    • 1.Sxg4+?
      • 1...Rf6
        • 2.Sd8#
      • 1...Sf6
        • 2.Sg5#
        • 2.Sd8#
      • 1...Kxf7!
    • 1.Sd5+?
      • 1...Rf6
        • 2.Qxe7#
      • 1...Sf6
        • 2.Qxe7#
      • 1...Kxf7!
    • 1.Sd7+?
      • 1...Rf6
        • 2.Sd8#
      • 1...Sf6
        • 2.Sg5#
        • 2.Sd8#
      • 1...Kxf7!
    • 1.Sxh7+?
      • 1...Rf6
        • 2.Shg5#
      • 1...Kxf7!
    • 1.Sg8+?
      • 1...Rf6
        • 2.Qxe7#
      • 1...Sf6
        • 2.Qxe7#
      • 1...Kxf7!
    • 1.Bb1+?
      • 1...Kxf7
        • 2.Qxe7#
      • 1...Bxe3!
    • 1.Bc2+?
      • 1...Kxf7
        • 2.Qxe7#
      • 1...Bxe3!
    • 1.Bd3+?
      • 1...Kxf7
        • 2.Qxe7#
      • 1...Bxe3!
    • 1.Bf5+?
      • 1...Kxf7
        • 2.Qxe7#
      • 1...Kxf5!
    • 1.Bxh7+?
      • 1...Kxf7
        • 2.Qxe7#
      • 1...Bxe3!
    • 1.Qb6+?
      • 1...Rxb6
        • 2.Sd8#
      • 1...Kxf7!
    • 1.Qa6+?
      • 1...Rb6
        • 2.Sd8#
        • 2.Qc4#
      • 1...Kxf7!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qd5#
      • 1...Kxf7
        • 2.Qg8#
      • 1...exf6
        • 2.Qe8#
      • 1...Rd2
        • 2.Bg6#
      • 1...Rb7
        • 2.Sd8#
      • 1...Rf5
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(b);::S(I)
    • R(b);S_CUTB(a)::R(B)+B(C)
    • R(d);SBLOCK::R(B)+B(C),DCHECK
  • Tries
    • Try
      • S(F);CHECK,XP(g)
      • Vars
        • R(d);P_SPINR(d)::S(I)
      • Refutation
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)
    • Try
      • S(F);CHECK
      • Vars
        • R(d);P_SPINR(d)::QAR1(H),XP(i)
        • S(j);P_SPINS(j)::QAR1(H),XP(i)
      • Refutation
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)
    • Try
      • S(F);CHECK
      • Vars
        • R(d);P_SPINR(d)::S(I)
      • Refutation
        • K(h);S_FLIGHT,XS(I)
    • Try
      • S(F);CHECK,XS(j)
      • Vars
        • R(d);P_SPINR(d)::S(F)
      • Refutation
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)
    • Try
      • S(F);CHECK
      • Vars
        • R(d);P_SPINR(d)::QAR1(H),XP(i)
        • S(j);P_SPINS(j)::QAR1(H),XP(i)
      • Refutation
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)
    • Try
      • B(C);CHECK
      • Vars
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)::QAR1(H),XP(i)
      • Refutation
        • B(a);XR(B)
    • Try
      • B(C);CHECK
      • Vars
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)::QAR1(H),XP(i)
      • Refutation
        • B(a);XR(B)
    • Try
      • B(C);CHECK
      • Vars
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)::QAR1(H),XP(i)
      • Refutation
        • B(a);XR(B)
    • Try
      • B(C);CHECK
      • Vars
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)::QAR1(H),XP(i)
      • Refutation
        • K(h);S_FLIGHT,XB(C)
    • Try
      • B(C);CHECK,XS(j)
      • Vars
        • K(h);P_SPINP(i),S_FLIGHT,XS(I)::QAR1(H),XP(i)
      • Refutation
        • B(a);XR(B)
    • Try
      • Q(H);CHECK
      • Vars
        • R(b);XQ(H)::S(I)
      • Refutation
        • K(h);S_FLIGHT,XS(I)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(h);S_FLIGHT,XS(I)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • K(h);OGATEB,S_FLIGHT,XS(I)::QAB1(H)
      • P(i);OGATEB,P_SPINP(i),XS(F)::QAR2(H)
      • R(b);S_CUTB(a)::R(B)+B(C)
      • R(b);::S(I)
      • R(d);SBLOCK::R(B)+B(C),DCHECK
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