MESON Chess Problem Database

Problem Display
PID: 110709 (1rB5/1Pk2p2/Q1NnpK2/4B3/N1n5/8/8/8 w - - 0 1)

Gruber, Bratoljub

Source?, 1955

1rB5/1Pk2p2/Q1NnpK2/4B3/N1n5/8/8/8

#2

7 + 6

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb7
      • 2.Qxb7#
    • 1...Ra8
      • 2.bxa8S#
    • 1...Rxc8
      • 2.bxc8Q#
    • 1...Sb2
      • 2.Qb6#
    • 1...Sd2
      • 2.Qb6#
    • 1...Sa3
      • 2.Qb6#
    • 1...Se3
      • 2.Qb6#
    • 1...Sa5
      • 2.Qb6#
    • 1...Sxe5
      • 2.Qb6#
    • 1...Sb6
      • 2.Qxb6#
  • Tries
    • 1.Bh2?
      • 1...Rxb7
        • 2.Qxb7#
      • 1...Rxc8
        • 2.bxc8Q#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Ra8
        • 2.bxa8S#
      • 1...Sb2
        • 2.Qb6#
      • 1...Sd2
        • 2.Qb6#
      • 1...Sa3
        • 2.Qb6#
      • 1...Se3
        • 2.Qb6#
      • 1...Sa5
        • 2.Qb6#
      • 1...Se5
        • 2.Qb6#
      • 1...e5!
    • 1.Bg3?
      • 1...Rxb7
        • 2.Qxb7#
      • 1...Rxc8
        • 2.bxc8Q#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Ra8
        • 2.bxa8S#
      • 1...Sb2
        • 2.Qb6#
      • 1...Sd2
        • 2.Qb6#
      • 1...Sa3
        • 2.Qb6#
      • 1...Se3
        • 2.Qb6#
      • 1...Sa5
        • 2.Qb6#
      • 1...Se5
        • 2.Qb6#
      • 1...e5!
    • 1.Bf4?
      • 1...Rxb7
        • 2.Qxb7#
      • 1...Rxc8
        • 2.bxc8Q#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Ra8
        • 2.bxa8S#
      • 1...Sb2
        • 2.Qb6#
      • 1...Sd2
        • 2.Qb6#
      • 1...Sa3
        • 2.Qb6#
      • 1...Se3
        • 2.Qb6#
      • 1...Sa5
        • 2.Qb6#
      • 1...Se5
        • 2.Qb6#
      • 1...e5!
    • 1.Bxd6+?
      • 1...Sxd6
        • 2.Qb6#
      • 1...Kxd6!
    • 1.Qa5+?
      • 1...Kxc6
        • 2.Qc5#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sxa5!
  • Keys
    • 1.Qa7!
      • 1...Kxc6
        • 2.Qc5#
      • 1...Rxb7
        • 2.Qxb7#
      • 1...Rxc8
        • 2.b8S#
      • 1...Sxe5
        • 2.Qb6#
      • 1...Ra8
        • 2.bxa8Q#
      • 1...Sb2
        • 2.Qb6#
      • 1...Sd2
        • 2.Qb6#
      • 1...Sa3
        • 2.Qb6#
      • 1...Se3
        • 2.Qb6#
      • 1...Sa5
        • 2.Qb6#
      • 1...Sb6
        • 2.Qxb6#

Anticipated by 203606(1924)

This anticipates 99761(1978)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATE,XP(F)::QAR1(C),XR(f)
    • R(f);OGATE::PXR(f)=S
    • R(f);OGATE,XB(G)::PXR(f)=Q
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD,N_SPINS(b),XB(B)::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • B(B);
      • Vars
        • R(f);OGATE,XP(F)::QAR1(C),XR(f)
        • R(f);OGATE,XB(G)::PXR(f)=Q
        • S(a);N_GUARD::QAB1(C),XS(a)
        • R(f);OGATE::PXR(f)=S
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD,N_SPINS(b)::QAB1(C)
      • Refutation
        • P(c);N_SPINS(b)
    • Try
      • B(B);
      • Vars
        • R(f);OGATE,XP(F)::QAR1(C),XR(f)
        • R(f);OGATE,XB(G)::PXR(f)=Q
        • S(a);N_GUARD::QAB1(C),XS(a)
        • R(f);OGATE::PXR(f)=S
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD,N_SPINS(b)::QAB1(C)
      • Refutation
        • P(c);N_SPINS(b)
    • Try
      • B(B);
      • Vars
        • R(f);OGATE,XP(F)::QAR1(C),XR(f)
        • R(f);OGATE,XB(G)::PXR(f)=Q
        • S(a);N_GUARD::QAB1(C),XS(a)
        • R(f);OGATE::PXR(f)=S
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD,N_SPINS(b)::QAB1(C)
      • Refutation
        • P(c);N_SPINS(b)
    • Try
      • B(B);CHECK,XS(b)
      • Vars
        • S(a);SBLOCK,XB(B)::QAB1(C)
      • Refutation
        • K(d);S_FLIGHT,XB(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);N_SPINS(b),OGATEB,P-FLIGHT,XS(D)::QAR1(C)
        • S(a);N_GUARD,N_SPINS(b),P_SPINS(a)::QAB1(C),XS(a)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(d);N_SPINS(b),OGATEB,P-FLIGHT,XS(D)::QAR1(C)
      • R(f);OGATE,P_SPINR(f),XP(F)::QAR1(C),XR(f)
      • R(f);OGATE,SBLOCK,XB(G)::P=S
      • S(a);N_GUARD,N_SPINS(b),XB(B)::QAB1(C)
      • R(f);OGATE::PXR(f)=Q
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
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