MESON Chess Problem Database

Problem Display
PID: 65034 (3K4/2PpP3/Rqrk1bbR/B1p2P2/5p2/2N5/8/4Q3 w - - 0 1)

Baev, Georgy S

Loshinski, Lev Ilich

HM., L'Echiquier, 1929

3K4/2PpP3/Rqrk1bbR/B1p2P2/5p2/2N5/8/4Q3

#2

9 + 8

5314 Grossmeister Shakhmatnoi Kompozitsii 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.c8S#
    • 1...Qxc7+
      • 2.Bxc7#
    • 1...Qb1
      • 2.c8S#
    • 1...Qb2
      • 2.c8S#
    • 1...Qb3
      • 2.c8S#
    • 1...Qb4
      • 2.c8S#
    • 1...Qb5
      • 2.c8S#
    • 1...Qb8+
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Bd4
      • 2.e8S#
    • 1...Be5
      • 2.e8S#
    • 1...Bxe7+
      • 2.Qxe7#
    • 1...Bg7
      • 2.e8S#
    • 1...Bh8
      • 2.e8S#
    • 1...Bh5
      • 2.Rxf6#
    • 1...Bh7
      • 2.Rxf6#
    • 1...Be8
      • 2.Rxf6#
  • Tries
    • 1.Rxg6?
      • threat
        • 2.Rxf6#
      • 1...Qxc7+
        • 2.Bxc7#
      • 1...Qb8+
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Qb3
        • 2.c8S#
      • 1...c4!
    • 1.Qd2+?
      • 1...Ke5
        • 2.Qd5#
      • 1...Bd4!
    • 1.Qd1+?
      • 1...Ke5
        • 2.Qd5#
      • 1...Bd4!
    • 1.Qe5+?
      • 1...Bxe5
        • 2.e8S#
      • 1...Kxe5!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qd5#
      • 1...Qxc7+
        • 2.Bxc7#
      • 1...Qb8+
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Bxe7+
        • 2.Qxe7#
      • 1...Bxc3
        • 2.e8S#
      • 1...Qb3
        • 2.c8S#
      • 1...Bf7
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(c);N_PINP(G),P_PINP(H),P_SPINR(d)::P=S
    • Q(c);CHECK,OGATE,P_PINP(H),P_SPINR(d),XP(G)::B(C),XQ(c)
    • Q(c);CHECK,N_PINP(G),P_PINP(H),P_SPINR(d)::PXQ(c)=Q
    • B(f);OGATE,P_SPINB(g)::P=S
    • B(f);CHECK,OGATE,P_SPINB(g),XP(H)::QAB1(A),XB(f)
    • B(g);OGATE,P_SPINB(f)::R(F),XB(f)
  • Tries
    • Try
      • R(F);P_PINB(f),XB(g)
      • Threat
        • R(F),XB(f)
      • Vars
        • Q(c);CHECK,OGATE,P_PINP(H),P_SPINR(d),XP(G)::B(C),XQ(c)
        • Q(c);CHECK,N_PINP(G),P_PINP(H),P_SPINR(d)::PXQ(c)=Q
        • Q(c);N_PINP(G),P_PINP(H),P_SPINR(d)::P=S
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(A)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(A)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • Q(A);CHECK
      • Vars
        • B(f);OGATE,P_SPINB(g),SBLOCK,XQ(A)::P=S
      • Refutation
        • K(e);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(c);CHECK,OGATE,P_PINP(H),P_SPINR(d),XP(G)::B(C),XQ(c)
      • Q(c);CHECK,N_PINP(G),P_PINP(H),P_SPINR(d)::PXQ(c)=Q
      • B(f);CHECK,OGATE,P_SPINB(g),XP(H)::QAB1(A),XB(f)
      • B(f);OGATE,P_SPINB(g),XS(B)::P=S
      • Q(c);N_PINP(G),P_PINP(H),P_SPINR(d)::P=S
      • B(g);P_SPINB(f)::QAB(A),XP(a)
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