MESON Chess Problem Database

Problem Display
PID: 64221 (4R1b1/1p4p1/1B2pbP1/Q3pP2/4kP2/3p3B/p2p2P1/rn1N1R1K w - - 0 1)

Zappas, Byron

Sp. Prize, O Pyrgos TT, 1977

4R1b1/1p4p1/1B2pbP1/Q3pP2/4kP2/3p3B/p2p2P1/rn1N1R1K

#2

11 + 12

3750 FIDE Album (1977-1979) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Qxe5#
    • 1...Bg5
      • 2.Qxe5#
    • 1...Be7
      • 2.Qxe5#
    • 1...Bd8
      • 2.Qxe5#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...exf4
      • 2.Sf2#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qb4#
        • 2.Qa4#
      • 1...exf4
        • 2.Qd5#
      • 1...exf5
        • 2.Bxf5#
      • 1...d1Q
        • 2.Qb4#
      • 1...d1B
        • 2.Qb4#
      • 1...Be7
        • 2.Qxe5#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sa3!
    • 1.Rc8?
      • threat
        • 2.Rc4#
      • 1...exf4
        • 2.Sf2#
      • 1...Sa3
        • 2.Sc3#
      • 1...exf5!
    • 1.Rd8?
      • threat
        • 2.Qb4#
        • 2.Qa4#
      • 1...Bxd8
        • 2.Qxe5#
      • 1...exf4
        • 2.Sf2#
      • 1...Be7
        • 2.Qxe5#
      • 1...Sa3
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
        • 2.Qb4#
      • 1...exf5!
    • 1.Rxg8?
      • 1...exf4
        • 2.Sf2#
      • 1...Bh4
        • 2.Qxe5#
      • 1...Bg5
        • 2.Qxe5#
      • 1...Be7
        • 2.Qxe5#
      • 1...Bd8
        • 2.Qxe5#
      • 1...Sa3
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...exf5!
    • 1.Qb5?
      • threat
        • 2.Qc4#
      • 1...exf4
        • 2.Sf2#
      • 1...Sa3
        • 2.Sc3#
      • 1...exf5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qc4#
      • 1...exf4
        • 2.Sf2#
      • 1...exf5
        • 2.Qd4#
      • 1...Sa3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(i);N_GUARD::QAR1(G),XP(g)
    • S(b);N_GUARD::S(A)
    • S(b);N_GUARD::S(A),XS(b)
    • P(g);P_SPINP(h),SBLOCK,XP(F)::S(A)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);P_SPINP(h),XP(F)::QAB1(G)
        • P(h);OGATE,P_SPINP(g),XP(H)::B(E),XP(h)
        • P(d);P_PINR(B)::QAR(G)
        • P(d);::QAR(G)
        • B(i);N_GUARD::QAR1(G),XP(g)
        • S(b);P_PINR(B)::QAR(G)
      • Refutation
        • S(b);P_PINR(B)
    • Try
      • R(K);
      • Threat
        • R(K)
      • Vars
        • P(g);SBLOCK,XP(F)::S(A)
        • S(b);N_GUARD::S(A)
      • Refutation
        • P(h);XP(H)
    • Try
      • R(K);
      • Threat
        • DUALS(2)
      • Vars
        • B(i);N_GUARD,XR(K)::QAR1(G),XP(g)
        • P(g);SBLOCK,XP(F)::S(A)
        • B(i);N_GUARD::QAR1(G),XP(g)
        • S(b);N_GUARD::S(A)
      • Refutation
        • P(h);XP(H)
    • Try
      • R(K);XB(l)
      • Vars
        • P(g);SBLOCK,XP(F)::S(A)
        • B(i);N_GUARD::QAR1(G),XP(g)
        • S(b);N_GUARD::S(A)
        • S(b);N_GUARD::S(A),XS(b)
      • Refutation
        • P(h);XP(H)
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • P(g);P_SPINP(h),SBLOCK,XP(F)::S(A)
        • S(b);N_GUARD::S(A)
      • Refutation
        • P(h);P_SPINP(g),XP(H)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G)
    • Vars
      • P(g);P_SPINP(h),SBLOCK,XP(F)::S(A)
      • P(h);P_SPINP(g),XP(H)::QAR1(G)
      • S(b);N_GUARD::S(A)
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