MESON Chess Problem Database

Problem Display
PID: 206324 (8/1p5p/bK2p2p/1p2N2p/1P3P2/5Qnk/4BB1b/8 w - - 0 1)

Palkoska, Emil

Comm., Centurini/Guidelli MT, 1925

8/1p5p/bK2p2p/1p2N2p/1P3P2/5Qnk/4BB1b/8

#2

7 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qxh5#
    • 1...Bg1
      • 2.Qxg3#
    • 1...h4
      • 2.Bf1#
  • Tries
    • 1.Ka5?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...b6+!
    • 1.Kc5?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...b6+!
    • 1.Ka7?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...b6!
    • 1.Kc7?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...b6!
    • 1.Sd3?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...e5!
    • 1.Sg6?
      • threat
        • 2.Bf1#
      • 1...Bg1
        • 2.Qxg3#
      • 1...hxg6!
    • 1.Sd7?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...e5!
    • 1.Sf7?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...e5!
    • 1.Bd1?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4!
    • 1.Bd3?
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...Kh4!
    • 1.Be1?
      • 1...Kh4
        • 2.Qxh5#
      • 1...h4
        • 2.Bf1#
      • 1...Bg1+!
    • 1.Qg2+?
      • 1...Kh4
        • 2.Qxh2#
      • 1...Kxg2!
    • 1.Qxh5+?
      • 1...Sxh5
        • 2.Bf1#
      • 1...Kg2!
    • 1.f5?
      • 1...Kh4
        • 2.Qxh5#
      • 1...Bg1
        • 2.Qxg3#
      • 1...h4
        • 2.Bf1#
      • 1...exf5!
  • Keys
    • 1.Qh1!
      • 1...Kh4
        • 2.Qxh2#
      • 1...Sxh1
        • 2.Bf1#
      • 1...Sxe2
        • 2.Qf1#
      • 1...Sf1
        • 2.Bxf1#
        • 2.Qxf1#
      • 1...Se4
        • 2.Bf1#
        • 2.Qf1#
      • 1...Sf5
        • 2.Bf1#
        • 2.Qf1#
      • 1...h4
        • 2.Bg4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::QAR1(C),XP(e)
    • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
    • P(e);SBLOCK::B(A)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • P(i);CHECK
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • P(i);CHECK
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • P(i);
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • P(i);
    • Try
      • S(F);
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • P(g);
    • Try
      • S(F);
      • Threat
        • B(A)
      • Vars
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
      • Refutation
        • P(j);XS(F)
    • Try
      • S(F);
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • P(g);
    • Try
      • S(F);
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • P(g);
    • Try
      • B(A);
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
      • Refutation
        • P(e);
    • Try
      • B(A);
      • Vars
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • B(B);
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • P(e);SBLOCK::B(A)
      • Refutation
        • B(a);CHECK
    • Try
      • Q(C);CHECK,N_PINS(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::QAR2(C),XB(a)
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK,N_PINS(b),XP(e)
      • Vars
        • S(b);XQ(C)::B(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(E);
      • Vars
        • K(c);P-FLIGHT::QAR1(C),XP(e)
        • B(a);N_GUARD,P_PINB(B)::QAR1(C),XS(b)
        • P(e);SBLOCK::B(A)
      • Refutation
        • P(g);XP(E)
  • Actual
    • Q(C);N_PINS(b),P_PINB(a)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::QAR2(C),XB(a)
      • S(b);N_GUARD,N_SPINB(a),XQ(C)::B(A)
      • S(b);N_GUARD,XB(A)::QAB(C)
      • P(e);N_GUARD,SBLOCK::B(A)
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