MESON Chess Problem Database

Problem Display
PID: 19481 (6K1/1p4B1/3Q4/8/4pR1p/1N2kBbR/2ppp2p/3q2rN w - - 0 1)

Ellerman, Arnoldo

Bulletin Piran, 1958

6K1/1p4B1/3Q4/8/4pR1p/1N2kBbR/2ppp2p/3q2rN

#2

8 + 11

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qxd2#
    • 1...Qb1
      • 2.Qxd2#
    • 1...Qf1
      • 2.Qxd2#
    • 1...Be1
      • 2.Rxe4#
    • 1...Bf2
      • 2.Rxe4#
    • 1...Bxf4
      • 2.Qd4#
    • 1...exf3
      • 2.Qd4#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Sg4#
        • 2.Bd4#
      • 1...Bxf2
        • 2.Rxe4#
      • 1...Bxf4
        • 2.Qc5#
        • 2.Qd4#
        • 2.Qb6#
      • 1...Qa1
        • 2.Sg4#
      • 1...Kxf2!
    • 1.Sc5?
      • threat
        • 2.Bd4#
      • 1...Bxf4
        • 2.Qd4#
      • 1...Be1
        • 2.Rxe4#
      • 1...Bf2
        • 2.Rxe4#
      • 1...Qa1!
    • 1.Qc5+?
      • 1...Kd3
        • 2.Bxe4#
        • 2.Qd4#
        • 2.Qc3#
      • 1...Kxf4!
    • 1.Qe5?
      • threat
        • 2.Qxe4#
      • 1...Kd3
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qxe4#
      • 1...Rxh1!
    • 1.Qb6+?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kxf4!
  • Keys
    • 1.Bh6!
      • threat
        • 2.Qd4#
      • 1...Be1+
        • 2.Rg4#
      • 1...Bf2+
        • 2.Rg4#
      • 1...Bxf4+
        • 2.Bg2#
      • 1...Qa1
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::QAB1(F),XP(d)
    • B(h);P_PINB(G)::R1(E),XP(i)
    • B(h);P_PINB(G),SBLOCK,XR(E)::QAB1(F)
    • P(i);XB(C)::QAB1(F)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(h);P_PINB(G),SBLOCK,XS(A)::R1(E),XP(i)
        • Q(a);::S(A)
      • Refutation
        • K(g);S_FLIGHT,XS(A)
    • Try
      • S(B);
      • Threat
        • B(G)
      • Vars
        • B(h);P_PINB(G),SBLOCK,XR(E)::QAB1(F)
        • B(h);P_PINB(G)::R1(E),XP(i)
      • Refutation
        • Q(a);
    • Try
      • Q(F);CHECK
      • Refutation
        • K(g);S_FLIGHT,XR(E)
    • Try
      • Q(F);P_PINP(i)
      • Threat
        • QAR1(F),XP(i)
      • Refutation
        • R(b);XS(A)
    • Try
      • Q(F);CHECK
      • Vars
        • K(g);P-FLIGHT::QAR1(F)
      • Refutation
        • K(g);S_FLIGHT,XR(E)
  • Actual
    • B(G);
    • Threat
      • QAB1(F)
    • Vars
      • B(h);CHECK,N_GUARD::B(G)+R(E)
      • B(h);CHECK,OGATEB,P_SPINB(h),XR(E)::R(D)+B(C)
      • Q(a);N_GUARD::QAB1(F),XP(d)
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