MESON Chess Problem Database

Problem Display
PID: 246629 (1B6/1b6/5pB1/2K2Nq1/3Pk1P1/1p2b1R1/1N1pQ1n1/4n3 w - - 0 1)

Ellerman, Arnoldo

El Ajedrez Espanol, 1935

1B6/1b6/5pB1/2K2Nq1/3Pk1P1/1p2b1R1/1N1pQ1n1/4n3

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Sd6#
    • 1...Qxf5+
      • 2.Bxf5#
    • 1...Sc2
      • 2.Qd3#
      • 2.Qf3#
      • 2.Qxg2#
    • 1...Sd3+
      • 2.Qxd3#
    • 1...Sf3
      • 2.Qd3#
      • 2.Qxf3#
    • 1...Sf4
      • 2.Rxe3#
      • 2.Qxe3#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Sf2#
        • 2.Sc3#
      • 1...Qxf5+
        • 2.Bxf5#
      • 1...Qf4
        • 2.Sc3#
        • 2.Sd6#
      • 1...Sd3+!
    • 1.Be5?
      • threat
        • 2.Sd6#
      • 1...Sd3+
        • 2.Qxd3#
      • 1...Qxf5
        • 2.Bxf5#
      • 1...fxe5!
    • 1.Rxe3+?
      • 1...Qxe3
        • 2.Sg3#
      • 1...Sxe3!
    • 1.Qxg2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sxg2!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qe6#
      • 1...Qxf5+
        • 2.Bxf5#
      • 1...Bxd4+
        • 2.Qxd4#
      • 1...Sd3+
        • 2.Qxd3#
      • 1...Qf4
        • 2.Sd6#
      • 1...Bf4
        • 2.d5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bc8
        • 2.Qd5#
      • 1...Sf3
        • 2.Qd3#
      • 1...Sf4
        • 2.Rxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(g);N_PINS(G),SBLOCK::B(H)+S(G),DCHECK
    • Q(g);CHECK,OGATE,P_SPINQ(g),XS(G)::B(H),XQ(g)
    • S(a);CHECK,N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,OGATE,P_SPINQ(g),XS(G)::B(H),XQ(g)
      • Refutation
        • S(a);CHECK
    • Try
      • B(I);N_SPINS(G)
      • Threat
        • B(H)+S(G),DCHECK
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(B),XS(a)
        • Q(g);OGATE,P_PINB(I),P_SPINQ(g),XS(G)::B(H),XQ(g)
      • Refutation
        • P(h);XB(I)
    • Try
      • R(C);CHECK,N_SPINP(D),XB(e)
      • Vars
        • Q(g);N_PINS(G),P_PINP(D),P_SPINQ(g),XR(C)::B(H)+S(G),DCHECK
      • Refutation
        • S(c);P_SPINS(c),XR(C)
    • Try
      • Q(B);CHECK,N_PINB(e),XS(c)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • Q(B);N_PINB(e)
    • Threat
      • QAR2(B)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XS(G)::B(H),XQ(g)
      • B(e);CHECK,OGATE,P_SPINB(e),XP(D)::QAR1(B),XB(e)
      • S(a);CHECK,N_GUARD::QAB1(B),XS(a)
      • Q(g);N_PINS(G),SBLOCK::B(H)+S(G),DCHECK
      • B(e);N_PINP(D)::QAR(B)+P(D)
      • B(i);N_GUARD,N_PINS(G)::QAB1(B),XB(i)
      • B(i);N_GUARD::QAB1(B)
      • S(a);N_GUARD::QAB1(B)
      • S(c);N_GUARD,S_CUTQ(g)::R1(C),XB(e)
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